These 216 colors have a special place in computer history.
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Computers use Red, Green, and Blue as primary colors in order to display all other colors. In the early days of digital displays, there was a very limited amount of colors that could be shown. Computers were limited to 8-bit color, which gave a maximum of 256 different values (2^8 = 256). If we take our 8-bit color limitation of 256 and find the cube root for our 3 primary colors, we get 6.349... If we take this cube root and reduce it to a whole number, we get 6. This means that on an 8-bit color display, we can have 6 different values (including 0) for Red, Green, or Blue. This gives us 216 color combinations (6^3 = 216) that would be safe for an 8-bit display. These 216 colors became the standard for computer graphics and web browsers.
Computers use hexadecimal color codes to identify each color, such as #FF9933. The first two digits show the Red value, the next two show the Green value, and the last two show the Blue value. This means that pure Red would be #FF0000, pure Green would be #00FF00, and pure Blue would be #0000FF.
Color strength:
00 = 0%
33 = 20%
66 = 40%
99 = 60%
CC = 80%
FF = 100%
Today, colors are displayed using a 24-bit system, which can show over 16 million different colors (2^24 = 16,777,216).
All 216 web colors in alphabetical order:
#000000
#000000
#000033
#000033
#000066
#000066
#000099
#000099
#0000CC
#0000CC
#0000FF
#0000FF
#003300
#003300
#003333
#003333
#003366
#003366
#003399
#003399
#0033CC
#0033CC
#0033FF
#0033FF
#006600
#006600
#006633
#006633
#006666
#006666
#006699
#006699
#0066CC
#0066CC
#0066FF
#0066FF
#009900
#009900
#009933
#009933
#009966
#009966
#009999
#009999
#0099CC
#0099CC
#0099FF
#0099FF
#00CC00
#00CC00
#00CC33
#00CC33
#00CC66
#00CC66
#00CC99
#00CC99
#00CCCC
#00CCCC
#00CCFF
#00CCFF
#00FF00
#00FF00
#00FF33
#00FF33
#00FF66
#00FF66
#00FF99
#00FF99
#00FFCC
#00FFCC
#00FFFF
#00FFFF
#330000
#330000
#330033
#330033
#330066
#330066
#330099
#330099
#3300CC
#3300CC
#3300FF
#3300FF
#333300
#333300
#333333
#333333
#333366
#333366
#333399
#333399
#3333CC
#3333CC
#3333FF
#3333FF
#336600
#336600
#336633
#336633
#336666
#336666
#336699
#336699
#3366CC
#3366CC
#3366FF
#3366FF
#339900
#339900
#339933
#339933
#339966
#339966
#339999
#339999
#3399CC
#3399CC
#3399FF
#3399FF
#33CC00
#33CC00
#33CC33
#33CC33
#33CC66
#33CC66
#33CC99
#33CC99
#33CCCC
#33CCCC
#33CCFF
#33CCFF
#33FF00
#33FF00
#33FF33
#33FF33
#33FF66
#33FF66
#33FF99
#33FF99
#33FFCC
#33FFCC
#33FFFF
#33FFFF
#660000
#660000
#660033
#660033
#660066
#660066
#660099
#660099
#6600CC
#6600CC
#6600FF
#6600FF
#663300
#663300
#663333
#663333
#663366
#663366
#663399
#663399
#6633CC
#6633CC
#6633FF
#6633FF
#666600
#666600
#666633
#666633
#666666
#666666
#666699
#666699
#6666CC
#6666CC
#6666FF
#6666FF
#669900
#669900
#669933
#669933
#669966
#669966
#669999
#669999
#6699CC
#6699CC
#6699FF
#6699FF
#66CC00
#66CC00
#66CC33
#66CC33
#66CC66
#66CC66
#66CC99
#66CC99
#66CCCC
#66CCCC
#66CCFF
#66CCFF
#66FF00
#66FF00
#66FF33
#66FF33
#66FF66
#66FF66
#66FF99
#66FF99
#66FFCC
#66FFCC
#66FFFF
#66FFFF
#990000
#990000
#990033
#990033
#990066
#990066
#990099
#990099
#9900CC
#9900CC
#9900FF
#9900FF
#993300
#993300
#993333
#993333
#993366
#993366
#993399
#993399
#9933CC
#9933CC
#9933FF
#9933FF
#996600
#996600
#996633
#996633
#996666
#996666
#996699
#996699
#9966CC
#9966CC
#9966FF
#9966FF
#999900
#999900
#999933
#999933
#999966
#999966
#999999
#999999
#9999CC
#9999CC
#9999FF
#9999FF
#99CC00
#99CC00
#99CC33
#99CC33
#99CC66
#99CC66
#99CC99
#99CC99
#99CCCC
#99CCCC
#99CCFF
#99CCFF
#99FF00
#99FF00
#99FF33
#99FF33
#99FF66
#99FF66
#99FF99
#99FF99
#99FFCC
#99FFCC
#99FFFF
#99FFFF
#CC0000
#CC0000
#CC0033
#CC0033
#CC0066
#CC0066
#CC0099
#CC0099
#CC00CC
#CC00CC
#CC00FF
#CC00FF
#CC3300
#CC3300
#CC3333
#CC3333
#CC3366
#CC3366
#CC3399
#CC3399
#CC33CC
#CC33CC
#CC33FF
#CC33FF
#CC6600
#CC6600
#CC6633
#CC6633
#CC6666
#CC6666
#CC6699
#CC6699
#CC66CC
#CC66CC
#CC66FF
#CC66FF
#CC9900
#CC9900
#CC9933
#CC9933
#CC9966
#CC9966
#CC9999
#CC9999
#CC99CC
#CC99CC
#CC99FF
#CC99FF
#CCCC00
#CCCC00
#CCCC33
#CCCC33
#CCCC66
#CCCC66
#CCCC99
#CCCC99
#CCCCCC
#CCCCCC
#CCCCFF
#CCCCFF
#CCFF00
#CCFF00
#CCFF33
#CCFF33
#CCFF66
#CCFF66
#CCFF99
#CCFF99
#CCFFCC
#CCFFCC
#CCFFFF
#CCFFFF
#FF0000
#FF0000
#FF0033
#FF0033
#FF0066
#FF0066
#FF0099
#FF0099
#FF00CC
#FF00CC
#FF00FF
#FF00FF
#FF3300
#FF3300
#FF3333
#FF3333
#FF3366
#FF3366
#FF3399
#FF3399
#FF33CC
#FF33CC
#FF33FF
#FF33FF
#FF6600
#FF6600
#FF6633
#FF6633
#FF6666
#FF6666
#FF6699
#FF6699
#FF66CC
#FF66CC
#FF66FF
#FF66FF
#FF9900
#FF9900
#FF9933
#FF9933
#FF9966
#FF9966
#FF9999
#FF9999
#FF99CC
#FF99CC
#FF99FF
#FF99FF
#FFCC00
#FFCC00
#FFCC33
#FFCC33
#FFCC66
#FFCC66
#FFCC99
#FFCC99
#FFCCCC
#FFCCCC
#FFCCFF
#FFCCFF
#FFFF00
#FFFF00
#FFFF33
#FFFF33
#FFFF66
#FFFF66
#FFFF99
#FFFF99
#FFFFCC
#FFFFCC
#FFFFFF
#FFFFFF