Color
颜色。可以用以下几种方式来表示 canvas 中使用的颜色：
- RGB 颜色： 如
'rgb(255, 0, 0)' - RGBA 颜色：如
'rgba(255, 0, 0, 0.3)' - 16 进制颜色： 如
'#FF0000' - 预定义的颜色： 如
'red'
其中预定义颜色有以下148个： *注意**: Color Name 大小写不敏感
| Color Name | HEX |
|---|---|
| AliceBlue | #F0F8FF |
| AntiqueWhite | #FAEBD7 |
| Aqua | #00FFFF |
| Aquamarine | #7FFFD4 |
| Azure | #F0FFFF |
| Beige | #F5F5DC |
| Bisque | #FFE4C4 |
| Black | #000000 |
| BlanchedAlmond | #FFEBCD |
| Blue | #0000FF |
| BlueViolet | #8A2BE2 |
| Brown | #A52A2A |
| BurlyWood | #DEB887 |
| CadetBlue | #5F9EA0 |
| Chartreuse | #7FFF00 |
| Chocolate | #D2691E |
| Coral | #FF7F50 |
| CornflowerBlue | #6495ED |
| Cornsilk | #FFF8DC |
| Crimson | #DC143C |
| Cyan | #00FFFF |
| DarkBlue | #00008B |
| DarkCyan | #008B8B |
| DarkGoldenRod | #B8860B |
| DarkGray | #A9A9A9 |
| DarkGrey | #A9A9A9 |
| DarkGreen | #006400 |
| DarkKhaki | #BDB76B |
| DarkMagenta | #8B008B |
| DarkOliveGreen | #556B2F |
| DarkOrange | #FF8C00 |
| DarkOrchid | #9932CC |
| DarkRed | #8B0000 |
| DarkSalmon | #E9967A |
| DarkSeaGreen | #8FBC8F |
| DarkSlateBlue | #483D8B |
| DarkSlateGray | #2F4F4F |
| DarkSlateGrey | #2F4F4F |
| DarkTurquoise | #00CED1 |
| DarkViolet | #9400D3 |
| DeepPink | #FF1493 |
| DeepSkyBlue | #00BFFF |
| DimGray | #696969 |
| DimGrey | #696969 |
| DodgerBlue | #1E90FF |
| FireBrick | #B22222 |
| FloralWhite | #FFFAF0 |
| ForestGreen | #228B22 |
| Fuchsia | #FF00FF |
| Gainsboro | #DCDCDC |
| GhostWhite | #F8F8FF |
| Gold | #FFD700 |
| GoldenRod | #DAA520 |
| Gray | #808080 |
| Grey | #808080 |
| Green | #008000 |
| GreenYellow | #ADFF2F |
| HoneyDew | #F0FFF0 |
| HotPink | #FF69B4 |
| IndianRed | #CD5C5C |
| Indigo | #4B0082 |
| Ivory | #FFFFF0 |
| Khaki | #F0E68C |
| Lavender | #E6E6FA |
| LavenderBlush | #FFF0F5 |
| LawnGreen | #7CFC00 |
| LemonChiffon | #FFFACD |
| LightBlue | #ADD8E6 |
| LightCoral | #F08080 |
| LightCyan | #E0FFFF |
| LightGoldenRodYellow | #FAFAD2 |
| LightGray | #D3D3D3 |
| LightGrey | #D3D3D3 |
| LightGreen | #90EE90 |
| LightPink | #FFB6C1 |
| LightSalmon | #FFA07A |
| LightSeaGreen | #20B2AA |
| LightSkyBlue | #87CEFA |
| LightSlateGray | #778899 |
| LightSlateGrey | #778899 |
| LightSteelBlue | #B0C4DE |
| LightYellow | #FFFFE0 |
| Lime | #00FF00 |
| LimeGreen | #32CD32 |
| Linen | #FAF0E6 |
| Magenta | #FF00FF |
| Maroon | #800000 |
| MediumAquaMarine | #66CDAA |
| MediumBlue | #0000CD |
| MediumOrchid | #BA55D3 |
| MediumPurple | #9370DB |
| MediumSeaGreen | #3CB371 |
| MediumSlateBlue | #7B68EE |
| MediumSpringGreen | #00FA9A |
| MediumTurquoise | #48D1CC |
| MediumVioletRed | #C71585 |
| MidnightBlue | #191970 |
| MintCream | #F5FFFA |
| MistyRose | #FFE4E1 |
| Moccasin | #FFE4B5 |
| NavajoWhite | #FFDEAD |
| Navy | #000080 |
| OldLace | #FDF5E6 |
| Olive | #808000 |
| OliveDrab | #6B8E23 |
| Orange | #FFA500 |
| OrangeRed | #FF4500 |
| Orchid | #DA70D6 |
| PaleGoldenRod | #EEE8AA |
| PaleGreen | #98FB98 |
| PaleTurquoise | #AFEEEE |
| PaleVioletRed | #DB7093 |
| PapayaWhip | #FFEFD5 |
| PeachPuff | #FFDAB9 |
| Peru | #CD853F |
| Pink | #FFC0CB |
| Plum | #DDA0DD |
| PowderBlue | #B0E0E6 |
| Purple | #800080 |
| RebeccaPurple | #663399 |
| Red | #FF0000 |
| RosyBrown | #BC8F8F |
| RoyalBlue | #4169E1 |
| SaddleBrown | #8B4513 |
| Salmon | #FA8072 |
| SandyBrown | #F4A460 |
| SeaGreen | #2E8B57 |
| SeaShell | #FFF5EE |
| Sienna | #A0522D |
| Silver | #C0C0C0 |
| SkyBlue | #87CEEB |
| SlateBlue | #6A5ACD |
| SlateGray | #708090 |
| SlateGrey | #708090 |
| Snow | #FFFAFA |
| SpringGreen | #00FF7F |
| SteelBlue | #4682B4 |
| Tan | #D2B48C |
| Teal | #008080 |
| Thistle | #D8BFD8 |
| Tomato | #FF6347 |
| Turquoise | #40E0D0 |
| Violet | #EE82EE |
| Wheat | #F5DEB3 |
| White | #FFFFFF |
| WhiteSmoke | #F5F5F5 |
| Yellow | #FFFF00 |
| YellowGreen | #9ACD32 |
支持情况：
