diff --git a/packages/suika/src/components/Cards/ElementsInfoCard/ElementsInfoCard.tsx b/packages/suika/src/components/Cards/ElementsInfoCard/ElementsInfoCard.tsx
index df9bff68..267f2430 100644
--- a/packages/suika/src/components/Cards/ElementsInfoCard/ElementsInfoCard.tsx
+++ b/packages/suika/src/components/Cards/ElementsInfoCard/ElementsInfoCard.tsx
@@ -109,7 +109,7 @@ export const ElementsInfoCards: FC = () => {
           <NumAttrInput
             {...item}
             key={item.key}
-            onBlur={(newVal) => {
+            onChange={(newVal) => {
               execCommand(item.key, newVal);
             }}
           />
@@ -120,7 +120,7 @@ export const ElementsInfoCards: FC = () => {
           <NumAttrInput
             {...item}
             key={item.key}
-            onBlur={(newVal) => {
+            onChange={(newVal) => {
               execCommand(item.key, newVal);
             }}
           />
@@ -131,7 +131,7 @@ export const ElementsInfoCards: FC = () => {
           <NumAttrInput
             {...item}
             key={item.key}
-            onBlur={(newVal) => {
+            onChange={(newVal) => {
               execCommand(item.key, newVal);
             }}
           />
@@ -143,7 +143,7 @@ export const ElementsInfoCards: FC = () => {
             <NumAttrInput
               {...item}
               key={item.key}
-              onBlur={(newVal) => {
+              onChange={(newVal) => {
                 execCommand(item.key, newVal);
               }}
             />
@@ -159,7 +159,7 @@ const NumAttrInput: FC<{
   min?: number;
   max?: number;
   value: string | number;
-  onBlur: (newValue: number) => void;
+  onChange: (newValue: number) => void;
   suffixValue?: string;
   uiType: string;
 }> = (props) => {
@@ -170,7 +170,7 @@ const NumAttrInput: FC<{
         value={props.value}
         min={props.min}
         max={props.max}
-        onBlur={props.onBlur}
+        onChange={props.onChange}
       />
     );
   } else {
@@ -180,7 +180,7 @@ const NumAttrInput: FC<{
         value={props.value}
         min={props.min}
         max={props.max}
-        onBlur={props.onBlur}
+        onChange={props.onChange}
         suffixValue={props.suffixValue}
       />
     );
diff --git a/packages/suika/src/components/Cards/LayerInfoCard/LayerInfoCard.tsx b/packages/suika/src/components/Cards/LayerInfoCard/LayerInfoCard.tsx
index 83481dd1..cf3d1bdf 100644
--- a/packages/suika/src/components/Cards/LayerInfoCard/LayerInfoCard.tsx
+++ b/packages/suika/src/components/Cards/LayerInfoCard/LayerInfoCard.tsx
@@ -63,7 +63,7 @@ export const LayerInfoCard: FC = () => {
           value={opacity}
           min={0}
           max={1}
-          onBlur={recordOpacityChange}
+          onChange={recordOpacityChange}
         />
       </div>
     </BaseCard>
diff --git a/packages/suika/src/components/Cards/PaintCard/PaintCard.scss b/packages/suika/src/components/Cards/PaintCard/PaintCard.scss
index 8b4e2649..c2079176 100644
--- a/packages/suika/src/components/Cards/PaintCard/PaintCard.scss
+++ b/packages/suika/src/components/Cards/PaintCard/PaintCard.scss
@@ -5,6 +5,22 @@
     justify-content: space-between;
     align-items: center;
     margin: 0 8px;
+
+    .fill-item-left {
+      display: flex;
+      align-items: center;
+
+      .suika-custom-ruler-input-box {
+        margin-right: 0;
+      }
+
+      .paint-card-alpha-input {
+        width: 45px;
+        margin-left: 0;
+        padding-left: 4px;
+      }
+    }
+
     .color-block {
       margin: 8px 4px 8px 7px;
       width: 16px;
diff --git a/packages/suika/src/components/Cards/PaintCard/PaintCard.tsx b/packages/suika/src/components/Cards/PaintCard/PaintCard.tsx
index 966f7657..cb3e03de 100644
--- a/packages/suika/src/components/Cards/PaintCard/PaintCard.tsx
+++ b/packages/suika/src/components/Cards/PaintCard/PaintCard.tsx
@@ -19,6 +19,7 @@ import { type FC, useState } from 'react';
 
 import { PaintPicker } from '../../ColorPicker/PaintPicker';
 import { ColorHexInput } from '../../input/ColorHexInput';
+import { PercentInput } from '../../input/PercentInput';
 import { BaseCard } from '../BaseCard';
 
 const isNearWhite = (rgba: IRGBA, threshold = 85) => {
@@ -112,37 +113,58 @@ export const PaintCard: FC<IProps> = ({
             if (paint.type === PaintType.Solid) {
               return (
                 <div className="fill-item" key={index}>
-                  <ColorHexInput
-                    prefix={
-                      <div
-                        className="color-block"
-                        style={{
-                          backgroundColor: parseRGBAStr(paint.attrs),
-                          boxShadow: isNearWhite(paint.attrs)
-                            ? '0 0 0 1px rgba(0,0,0,0.1) inset'
-                            : undefined,
-                        }}
-                        onMouseDown={() => {
-                          setActiveIndex(index);
-                        }}
-                      />
-                    }
-                    value={parseRGBToHex(paint.attrs)}
-                    onBlur={(newHex) => {
-                      const rgb = parseHexToRGB(newHex);
+                  <div className="fill-item-left">
+                    <ColorHexInput
+                      prefix={
+                        <div
+                          className="color-block"
+                          style={{
+                            backgroundColor: parseRGBAStr(paint.attrs),
+                            boxShadow: isNearWhite(paint.attrs)
+                              ? '0 0 0 1px rgba(0,0,0,0.1) inset'
+                              : undefined,
+                          }}
+                          onMouseDown={() => {
+                            setActiveIndex(index);
+                          }}
+                        />
+                      }
+                      value={parseRGBToHex(paint.attrs)}
+                      onChange={(newHex) => {
+                        const rgb = parseHexToRGB(newHex);
 
-                      if (rgb) {
-                        const newSolidPaint: PaintSolid = {
-                          type: PaintType.Solid,
-                          attrs: {
-                            ...rgb,
-                            a: paint.attrs.a,
+                        if (rgb) {
+                          const newSolidPaint: PaintSolid = {
+                            type: PaintType.Solid,
+                            attrs: {
+                              ...rgb,
+                              a: paint.attrs.a,
+                            },
+                          };
+                          onChangeComplete(newSolidPaint, index);
+                        }
+                      }}
+                    />
+                    {/* alpha input */}
+                    <PercentInput
+                      classNames={['paint-card-alpha-input']}
+                      value={paint.attrs.a}
+                      min={0}
+                      max={1}
+                      onChange={(val) => {
+                        onChangeComplete(
+                          {
+                            ...paint,
+                            attrs: {
+                              ...paint.attrs,
+                              a: val,
+                            },
                           },
-                        };
-                        onChangeComplete(newSolidPaint, index);
-                      }
-                    }}
-                  />
+                          index,
+                        );
+                      }}
+                    />
+                  </div>
                   <IconButton onClick={() => onDelete(index)}>
                     <RemoveOutlined />
                   </IconButton>
diff --git a/packages/suika/src/components/Cards/StrokeCard/StrokeCard.tsx b/packages/suika/src/components/Cards/StrokeCard/StrokeCard.tsx
index 2ed48f4d..36835b93 100644
--- a/packages/suika/src/components/Cards/StrokeCard/StrokeCard.tsx
+++ b/packages/suika/src/components/Cards/StrokeCard/StrokeCard.tsx
@@ -213,7 +213,7 @@ export const StrokeCard: FC = () => {
             }
             value={strokeWidth}
             min={0}
-            onBlur={updateStrokeWidth}
+            onChange={updateStrokeWidth}
           />
         </div>
       }
diff --git a/packages/suika/src/components/ColorPicker/PaintPicker/PaintPicker.scss b/packages/suika/src/components/ColorPicker/PaintPicker/PaintPicker.scss
index 1c05b043..248c6567 100644
--- a/packages/suika/src/components/ColorPicker/PaintPicker/PaintPicker.scss
+++ b/packages/suika/src/components/ColorPicker/PaintPicker/PaintPicker.scss
@@ -2,9 +2,9 @@
   border-radius: 4px;
   background-color: #fff;
 
-  box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.08), 0px 10px 24px rgba(0, 0, 0, 0.18),
-    0px 2px 5px rgba(0, 0, 0, 0.15), 0px 2px 14px rgba(0, 0, 0, 0.15),
-    0px 0px 0px 0.5px rgba(0, 0, 0, 0.2);
+  // box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.08), 0px 10px 24px rgba(0, 0, 0, 0.18),
+  //   0px 2px 5px rgba(0, 0, 0, 0.15), 0px 2px 14px rgba(0, 0, 0, 0.15),
+  //   0px 0px 0px 0.5px rgba(0, 0, 0, 0.2);
 
   .sketch-picker {
     box-shadow: none !important;
diff --git a/packages/suika/src/components/input/ColorHexInput.tsx b/packages/suika/src/components/input/ColorHexInput.tsx
index eab066d7..8994f290 100644
--- a/packages/suika/src/components/input/ColorHexInput.tsx
+++ b/packages/suika/src/components/input/ColorHexInput.tsx
@@ -5,11 +5,11 @@ import CustomRuleInput from './CustomRuleInput';
 
 interface IProps {
   value: string;
-  onBlur: (newValue: string) => void;
+  onChange: (newValue: string) => void;
   prefix?: React.ReactNode;
 }
 
-export const ColorHexInput: FC<IProps> = ({ value, onBlur, prefix }) => {
+export const ColorHexInput: FC<IProps> = ({ value, onChange, prefix }) => {
   const inputRef = useRef<HTMLInputElement>(null);
 
   useEffect(() => {
@@ -31,7 +31,7 @@ export const ColorHexInput: FC<IProps> = ({ value, onBlur, prefix }) => {
         return str;
       }}
       value={value}
-      onBlur={(newVal) => onBlur(newVal)}
+      onChange={(newVal) => onChange(newVal)}
     />
   );
 };
diff --git a/packages/suika/src/components/input/CustomRuleInput/index.tsx b/packages/suika/src/components/input/CustomRuleInput/index.tsx
index 098404cb..928ebd98 100644
--- a/packages/suika/src/components/input/CustomRuleInput/index.tsx
+++ b/packages/suika/src/components/input/CustomRuleInput/index.tsx
@@ -1,20 +1,18 @@
 import './style.scss';
 
+import classNames from 'classnames';
 import React, { type FC, useEffect, useRef } from 'react';
 
 interface ICustomRuleInputProps {
   parser: (newValue: string, preValue: string | number) => string | false;
   value: string | number;
-  onBlur: (newValue: string) => void;
+  onChange: (newValue: string) => void;
   prefix?: React.ReactNode;
+  classNames?: string[];
 }
 
-const CustomRuleInput: FC<ICustomRuleInputProps> = ({
-  value,
-  onBlur,
-  parser,
-  prefix,
-}) => {
+const CustomRuleInput: FC<ICustomRuleInputProps> = (props) => {
+  const { value, onChange, parser, prefix } = props;
   const inputRef = useRef<HTMLInputElement>(null);
   const isActive = useRef(false);
 
@@ -25,7 +23,9 @@ const CustomRuleInput: FC<ICustomRuleInputProps> = ({
   }, [value]);
 
   return (
-    <div className="suika-custom-ruler-input-box">
+    <div
+      className={classNames('suika-custom-ruler-input-box', props.classNames)}
+    >
       {prefix && <div className="suika-custom-input-prefix">{prefix}</div>}
       <input
         ref={inputRef}
@@ -52,7 +52,7 @@ const CustomRuleInput: FC<ICustomRuleInputProps> = ({
             const newValue = parser(str, value);
             if (newValue !== false) {
               e.target.value = String(newValue);
-              onBlur(newValue);
+              onChange(newValue);
             } else {
               e.target.value = String(value);
             }
diff --git a/packages/suika/src/components/input/NumberInput.tsx b/packages/suika/src/components/input/NumberInput.tsx
index 53ea077a..b7d791cd 100644
--- a/packages/suika/src/components/input/NumberInput.tsx
+++ b/packages/suika/src/components/input/NumberInput.tsx
@@ -11,20 +11,24 @@ interface INumberInputProps {
   value: string | number;
   min?: number;
   max?: number;
-  onBlur: (newValue: number) => void;
+  onChange: (newValue: number) => void;
   prefix?: React.ReactNode;
   /** suffix string after input value, such like ° => 12.34° */
   suffixValue?: string;
+  classNames?: string[];
 }
 
-const NumberInput: FC<INumberInputProps> = ({
-  value,
-  min = -Infinity,
-  max = Infinity,
-  onBlur,
-  prefix,
-  suffixValue = '',
-}) => {
+const NumberInput: FC<INumberInputProps> = (props) => {
+  const {
+    value,
+    min = -Infinity,
+    max = Infinity,
+    onChange,
+    prefix,
+    suffixValue = '',
+    classNames,
+  } = props;
+
   const inputRef = useRef<HTMLInputElement>(null);
 
   useEffect(() => {
@@ -52,7 +56,8 @@ const NumberInput: FC<INumberInputProps> = ({
         }
       }}
       value={isNumberStr(String(value)) ? value + suffixValue : value}
-      onBlur={(newVal) => onBlur(Number(newVal))}
+      classNames={classNames}
+      onChange={(newVal) => onChange(Number(newVal))}
     />
   );
 };
diff --git a/packages/suika/src/components/input/PercentInput.tsx b/packages/suika/src/components/input/PercentInput.tsx
index 996a1027..42946827 100644
--- a/packages/suika/src/components/input/PercentInput.tsx
+++ b/packages/suika/src/components/input/PercentInput.tsx
@@ -7,7 +7,8 @@ interface Props {
   value: string | number;
   min?: number;
   max?: number;
-  onBlur: (value: number) => void;
+  onChange: (value: number) => void;
+  classNames?: string[];
 }
 
 export const PercentInput: FC<Props> = (props) => {
@@ -15,7 +16,7 @@ export const PercentInput: FC<Props> = (props) => {
     typeof props.value === 'number'
       ? Number((props.value * 100).toFixed(2))
       : props.value;
-  const onBlur = (value: number) => props.onBlur(value / 100);
+  const onChange = (value: number) => props.onChange(value / 100);
 
   const min = props.min === undefined ? undefined : props.min * 100;
   const max = props.max === undefined ? undefined : props.max * 100;
@@ -26,8 +27,9 @@ export const PercentInput: FC<Props> = (props) => {
       min={min}
       max={max}
       suffixValue="%"
-      onBlur={onBlur}
+      onChange={onChange}
       prefix={props.prefix}
+      classNames={props.classNames}
     />
   );
 };