C#での色の指定について
Color構造体（System.Drawing名前空間）は、.NET Frameworkで使う色情報を定義しています。 C#（.NET Framework）で色を指定する場合、Color構造体（クラス）に定義されている定義色を使います。
Color構造体に定義されている定義色一覧
| 定義色 | R,G,B | 定義色 | R,G,B |
| .AliceBlue | 240,248,255 | .LightSalmon | 255,160,122 |
| .AntiqueWhite | 250,235,215 | .LightSeaGreen | 32,178,170 |
| .Aqua | 0,255,255 | .LightSkyBlue | 135,206,250 |
| .Aquamarine | 127,255,212 | .LightSlateGray | 119,136,153 |
| .Azure | 240,255,255 | .LightSteelBlue | 176,196,222 |
| .Beige | 245,245,220 | .LightYellow | 255,255,224 |
| .Bisque | 255,228,196 | .Lime | 0,255,0 |
| .Black | 0,0,0 | .LimeGreen | 50,205,50 |
| .BlanchedAlmond | 255,255,205 | .Linen | 250,240,230 |
| .Blue | 0,0,255 | .Magenta | 255,0,255 |
| .BlueViolet | 138,43,226 | .Maroon | 128,0,0 |
| .Brown | 165,42,42 | .MediumAquamarine | 102,205,170 |
| .BurlyWood | 222,184,135 | .MediumBlue | 0,0,205 |
| .CadetBlue | 95,158,160 | .MediumOrchid | 186,85,211 |
| .Chartreuse | 127,255,0 | .MediumPurple | 147,112,219 |
| .Chocolate | 210,105,30 | .MediumSeaGreen | 60,179,113 |
| .Coral | 255,127,80 | .MediumSlateBlue | 123,104,238 |
| .CornflowerBlue | 100,149,237 | .MediumSpringGreen | 0,250,154 |
| .Cornsilk | 255,248,220 | .MediumTurquoise | 72,209,204 |
| .Crimson | 220,20,60 | .MediumVioletRed | 199,21,112 |
| .Cyan | 0,255,255 | .MidnightBlue | 25,25,112 |
| .DarkBlue | 0,0,139 | .MintCream | 245,255,250 |
| .DarkCyan | 0,139,139 | .MistyRose | 255,228,225 |
| .DarkGoldenrod | 184,134,11 | .Moccasin | 255,228,181 |
| .DarkGray | 169,169,169 | .NavajoWhite | 255,222,173 |
| .DarkGreen | 0,100,0 | .Navy | 0,0,128 |
| .DarkKhaki | 189,183,107 | .OldLace | 253,245,230 |
| .DarkMagena | 139,0,139 | .Olive | 128,128,0 |
| .DarkOliveGreen | 85,107,47 | .OliveDrab | 107,142,45 |
| .DarkOrange | 255,140,0 | .Orange | 255,165,0 |
| .DarkOrchid | 153,50,204 | .OrangeRed | 255,69,0 |
| .DarkRed>DarkRed | 139,0,0 | .Orchid | 218,112,214 |
| .DarkSalmon | 233,150,122 | .PaleGoldenrod | 238,232,170 |
| .DarkSeaGreen | 143,188,143 | .PaleGreen | 152,251,152 |
| .DarkSlateBlue | 72,61,139 | .PaleTurquoise | 175,238,238 |
| .DarkSlateGray | 40,79,79 | .PaleVioletRed | 219,112,147 |
| .DarkTurquoise | 0,206,209 | .PapayaWhip | 255,239,213 |
| .DarkViolet | 148,0,211 | .PeachPuff | 255,218,155 |
| .DeepPink | 255,20,147 | .Peru | 205,133,63 |
| .DeepSkyBlue | 0,191,255 | .Pink | 255,192,203 |
| .DimGray | 105,105,105 | .Plum | 221,160,221 |
| .DodgerBlue | 30,144,255 | .PowderBlue | 176,224,230 |
| .Firebrick | 178,34,34 | .Purple | 128,0,128 |
| .FloralWhite | 255,250,240 | .Red | 255,0,0 |
| .ForestGreen | 34,139,34 | .RosyBrown | 188,143,143 |
| .Fuschia | 255,0,255 | .RoyalBlue | 65,105,225 |
| .Gainsboro | 220,220,220 | .SaddleBrown | 139,69,19 |
| .GhostWhite | 248,248,255 | .Salmon | 250,128,114 |
| .Gold | 255,215,0 | .SandyBrown | 244,164,96 |
| .Goldenrod | 218,165,32 | .SeaGreen | 46,139,87 |
| .Gray | 128,128,128 | .Seashell | 255,245,238 |
| .Green | 0,128,0 | .Sienna | 160,82,45 |
| .GreenYellow | 173,255,47 | .Silver | 192,192,192 |
| .Honeydew | 240,255,240 | .SkyBlue | 135,206,235 |
| .HotPink | 255,105,180 | .SlateBlue | 106,90,205 |
| .IndianRed | 205,92,92 | .SlateGray | 112,128,144 |
| .Indigo | 75,0,130 | .Snow | 255,250,250 |
| .Ivory | 255,240,240 | .SpringGreen | 0,255,127 |
| .Khaki | 240,230,140 | .SteelBlue | 70,130,180 |
| .Lavender | 230,230,250 | .Tan | 210,180,140 |
| .LavenderBlush | 255,240,245 | .Teal | 0,128,128 |
| .LawnGreen | 124,252,0 | .Thistle | 216,191,216 |
| .LemonChiffon | 255,250,205 | .Tomato | 253,99,71 |
| .LightBlue | 173,216,230 | .Turquoise | 64,224,208 |
| .LightCoral | 240,128,128 | .Violet | 238,130,238 |
| .LightCyan | 224,255,255 | .Wheat | 245,222,179 |
| .LightGoldenrodYellow | 250,250,210 | .White | 255,255,255 |
| .LightGreen | 144,238,144 | .WhiteSmoke | 245,245,245 |
| .LightGray | 211,211,211 | .Yellow | 255,255,0 |
| .LightPink | 255,182,193 | .YellowGreen | 154,205,50 |