コンピューターのディスプレイでの色の表現は、光の3原色ＲＧＢで管理しています。
Ｒ：赤 Ｇ：緑 Ｂ：青の組み合わせで、各色（16進数で）00からFFまでの256色（各色の明るさ）で256×256×256の16,777,216色(32ビットカラー)の表現が出来る。コンピューターでは0か1（2進法）でデーターの処理・表現をしますので中間はありません。下の表にWebセーフカラーを表示しました、ホームページの文字や背景などの、色の指定などにご利用ください。
| ■#000000 | ■#000033 | ■#000066 | ■#000099 | ■#0000cc | ■#0000ff |
| ■#003300 | ■#003333 | ■#003366 | ■#003399 | ■#0033cc | ■#0033ff |
| ■#006600 | ■#006633 | | | | |
| ■#009900 | ■#009933 | | | | |
| ■#00cc00 | ■#00cc33 | | | | |
| ■#00ff00 | ■#00ff33 | | | | |
| ■#000000 | ■#000033 | ■#000066 | ■#000099 | ■#0000cc | ■#0000ff |
| ■#003300 | ■#003333 | ■#003366 | ■#003399 | ■#0033cc | ■#0033ff |
| ■#006600 | ■#006633 | ■#006666 | ■#006699 | ■#0066cc | ■#0066ff |
| ■#009900 | ■#009933 | ■#009966 | ■#009999 | ■#0099cc | ■#0099ff |
| ■#00cc00 | ■#00cc33 | ■#00cc66 | ■#00cc99 | ■#00cccc | ■#00ccff |
| ■#00ff00 | ■#00ff33 | ■#00ff66 | ■#00ff99 | ■#00ffcc | ■#00ffff |
| ■#330000 | ■#330033 | ■#330066 | ■#330099 | ■#3300cc | ■#3300ff |
| ■#333300 | ■#333333 | ■#333366 | ■#333399 | ■#3333cc | ■#3333ff |
| ■#336600 | ■#336633 | ■#336666 | ■#336699 | ■#3366cc | ■#3366ff |
| ■#339900 | ■#339933 | ■#339966 | ■#339999 | ■#3399cc | ■#3399ff |
| ■#33cc00 | ■#33cc33 | ■#33cc66 | ■#33cc99 | ■#33cccc | ■#33ccff |
| ■#33ff00 | ■#33ff33 | ■#33ff66 | ■#33ff99 | ■#33ffcc | ■#33ffff |
| ■#660000 | ■#660033 | ■#660066 | ■#660099 | ■#6600cc | ■#6600ff |
| ■#663300 | ■#663333 | ■#663366 | ■#663399 | ■#6633cc | ■#6633ff |
| ■#666600 | ■#666633 | ■#666666 | ■#666699 | ■#6666cc | ■#6666ff |
| ■#669900 | ■#669933 | ■#669966 | ■#669999 | ■#6699cc | ■#6699ff |
| ■#66cc00 | ■#66cc33 | ■#66cc66 | ■#66cc99 | ■#66cccc | ■#66ccff |
| ■#66ff00 | ■#66ff33 | ■#66ff66 | ■#66ff99 | ■#66ffcc | ■#66ffff |
| ■#990000 | ■#990033 | ■#990066 | ■#990099 | ■#9900cc | ■#9900ff |
| ■#993300 | ■#993333 | ■#993366 | ■#993399 | ■#9933cc | ■#9933ff |
| ■#996600 | ■#996633 | ■#996666 | ■#996699 | ■#9966cc | ■#9966ff |
| ■#999900 | ■#999933 | ■#999966 | ■#999999 | ■#9999cc | ■#9999ff |
| ■#99cc00 | ■#99cc33 | ■#99cc66 | ■#99cc99 | ■#99cccc | ■#99ccff |
| ■#99ff00 | ■#99ff33 | ■#99ff66 | ■#99ff99 | ■#99ffcc | ■#99ffff |
| ■#cc0000 | ■#cc0033 | ■#cc0066 | ■#cc0099 | ■#cc00cc | ■#cc00ff |
| ■#cc3300 | ■#cc3333 | ■#cc3366 | ■#cc3399 | ■#cc33cc | ■#cc33ff |
| ■#cc6600 | ■#cc6633 | ■#cc6666 | ■#cc6699 | ■#cc66cc | ■#cc66ff |
| ■#cc9900 | ■#cc9933 | ■#cc9966 | ■#cc9999 | ■#cc99cc | ■#cc99ff |
| ■#cccc00 | ■#cccc33 | ■#cccc66 | ■#cccc99 | ■#cccccc | ■#ccccff |
| ■#ccff00 | ■#ccff33 | ■#ccff66 | ■#ccff99 | ■#ccffcc | ■#ccffff |
| ■#ff0000 | ■#ff0033 | ■#ff0066 | ■#ff0099 | ■#ff00cc | ■#ff00ff |
| ■#ff3300 | ■#ff3333 | ■#ff3366 | ■#ff3399 | ■#ff33cc | ■#ff33ff |
| ■#ff6600 | ■#ff6633 | ■#ff6666 | ■#ff6699 | ■#ff66cc | ■#ff66ff |
| ■#ff9900 | ■#ff9933 | ■#ff9966 | ■#ff9999 | ■#ff99cc | ■#ff99ff |
| ■#ffcc00 | ■#ffcc33 | ■#ffcc66 | ■#ffcc99 | ■#ffcccc | ■#ffccff |
| ■#ffff00 | ■#ffff33 | ■#ffff66 | ■#ffff99 | ■#ffffcc | ■#ffffff |