canvas 文档整改，修改颜色表示方法

Signed-off-by: Nlanyill <lanyi3@huawei.com>

zh-cn/application-dev/reference/arkui-js/js-components-canvas-canvasrenderingcontext2d.md

@@ -1652,9 +1652,9 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): Object
       // Linear gradient: start(50,0) end(300,100)
       var gradient = ctx.createLinearGradient(50,0, 300,100);
       // Add three color stops
-      gradient.addColorStop(0.0, 'red');
-      gradient.addColorStop(0.5, 'white');
-      gradient.addColorStop(1.0, 'green');
+      gradient.addColorStop(0.0, '#ff0000');
+      gradient.addColorStop(0.5, '#ffffff');
+      gradient.addColorStop(1.0, '#00ff00');
       // Set the fill style and draw a rectangle
       ctx.fillStyle = gradient;
       ctx.fillRect(0, 0, 500, 500);
@@ -1703,9 +1703,9 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
       // Radial gradient: inner circle(200,200,r:50) outer circle(200,200,r:200)
       var gradient = ctx.createRadialGradient(200,200,50, 200,200,200);
       // Add three color stops
-      gradient.addColorStop(0.0, 'red');
-      gradient.addColorStop(0.5, 'white');
-      gradient.addColorStop(1.0, 'green');
+      gradient.addColorStop(0.0, '#ff0000');
+      gradient.addColorStop(0.5, '#ffffff');
+      gradient.addColorStop(1.0, '#00ff00');
       // Set the fill style and draw a rectangle
       ctx.fillStyle = gradient;
       ctx.fillRect(0, 0, 500, 500);

zh-cn/application-dev/reference/arkui-js/js-offscreencanvasrenderingcontext2d.md

@@ -204,13 +204,13 @@ resetTransform(): void
      var offscreenCanvasCtx = offscreen.getContext("2d");
   
      offscreenCanvasCtx.transform(1, 0, 1.7, 1, 0, 0);
-     offscreenCanvasCtx.fillStyle = 'gray';
+     offscreenCanvasCtx.fillStyle = '#a9a9a9';
      offscreenCanvasCtx.fillRect(40, 40, 50, 20);
      offscreenCanvasCtx.fillRect(40, 90, 50, 20);
   
      // Non-skewed rectangles
      offscreenCanvasCtx.resetTransform();
-     offscreenCanvasCtx.fillStyle = 'red';
+     offscreenCanvasCtx.fillStyle = '#ff0000';
      offscreenCanvasCtx.fillRect(40, 40, 50, 20);
      offscreenCanvasCtx.fillRect(40, 90, 50, 20);
   

zh-cn/application-dev/reference/arkui-ts/ts-canvasrenderingcontext2d.md

@@ -1576,7 +1576,7 @@ struct Fill {
           region.lineTo(270, 90)
           region.closePath()
           // Fill path
-          this.context.fillStyle = 'green'
+          this.context.fillStyle = '#00ff00'
           this.context.fill(region, "evenodd")
         })
     }
@@ -2410,7 +2410,7 @@ restore(): void
           .backgroundColor('#ffff00')
           .onReady(() =>{
             this.context.save() // save the default state
-            this.context.fillStyle = "green"
+            this.context.fillStyle = "#00ff00"
             this.context.fillRect(20, 20, 100, 100)
             this.context.restore() // restore to the default state
             this.context.fillRect(150, 75, 100, 100)
@@ -2448,7 +2448,7 @@ save(): void
           .backgroundColor('#ffff00')
           .onReady(() =>{
             this.context.save() // save the default state
-            this.context.fillStyle = "green"
+            this.context.fillStyle = "#00ff00"
             this.context.fillRect(20, 20, 100, 100)
             this.context.restore() // restore to the default state
             this.context.fillRect(150, 75, 100, 100)
@@ -2495,9 +2495,9 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void
           .backgroundColor('#ffff00')
           .onReady(() =>{
             var grad = this.context.createLinearGradient(50,0, 300,100)
-            grad.addColorStop(0.0, 'red')
-            grad.addColorStop(0.5, 'white')
-            grad.addColorStop(1.0, 'green')
+            grad.addColorStop(0.0, '#ff0000')
+            grad.addColorStop(0.5, '#ffffff')
+            grad.addColorStop(1.0, '#00ff00')
             this.context.fillStyle = grad
             this.context.fillRect(0, 0, 500, 500)
           })
@@ -2546,9 +2546,9 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
           .backgroundColor('#ffff00')
           .onReady(() =>{
             var grad = this.context.createRadialGradient(200,200,50, 200,200,200)
-            grad.addColorStop(0.0, 'red')
-            grad.addColorStop(0.5, 'white')
-            grad.addColorStop(1.0, 'green')
+            grad.addColorStop(0.0, '#ff0000')
+            grad.addColorStop(0.5, '#ffffff')
+            grad.addColorStop(1.0, '#00ff00')
             this.context.fillStyle = grad
             this.context.fillRect(0, 0, 500, 500)
           })

zh-cn/application-dev/reference/arkui-ts/ts-components-canvas-canvasgradient.md

@@ -41,9 +41,9 @@ struct Page45 {
         .backgroundColor('#ffff00')
         .onReady(() => {
           var grad = this.context.createLinearGradient(50, 0, 300, 100)
-          grad.addColorStop(0.0, 'red')
-          grad.addColorStop(0.5, 'white')
-          grad.addColorStop(1.0, 'green')
+          grad.addColorStop(0.0, '#ff0000')
+          grad.addColorStop(0.5, '#ffffff')
+          grad.addColorStop(1.0, '#00ff00')
           this.context.fillStyle = grad
           this.context.fillRect(0, 0, 500, 500)
         })

zh-cn/application-dev/reference/arkui-ts/ts-offscreencanvasrenderingcontext2d.md

@@ -2626,9 +2626,9 @@ createLinearGradient(x0: number, y0: number, x1: number, y1: number): void
           .backgroundColor('#ffff00')
           .onReady(() =>{
             var grad = this.offContext.createLinearGradient(50,0, 300,100)
-            grad.addColorStop(0.0, 'red')
-            grad.addColorStop(0.5, 'white')
-            grad.addColorStop(1.0, 'green')
+            grad.addColorStop(0.0, '#ff0000')
+            grad.addColorStop(0.5, '#ffffff')
+            grad.addColorStop(1.0, '#00ff00')
             this.offContext.fillStyle = grad
             this.offContext.fillRect(0, 0, 500, 500)
             var image = this.offContext.transferToImageBitmap()
@@ -2680,9 +2680,9 @@ createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number,
           .backgroundColor('#ffff00')
           .onReady(() =>{
             var grad = this.offContext.createRadialGradient(200,200,50, 200,200,200)
-            grad.addColorStop(0.0, 'red')
-            grad.addColorStop(0.5, 'white')
-            grad.addColorStop(1.0, 'green')
+            grad.addColorStop(0.0, '#ff0000')
+            grad.addColorStop(0.5, '#ffffff')
+            grad.addColorStop(1.0, '#00ff00')
             this.offContext.fillStyle = grad
             this.offContext.fillRect(0, 0, 500, 500)
             var image = this.offContext.transferToImageBitmap()