#6666AA
#6666AA
Blues · #66a is the three-digit shorthand for #6666AA. In CSS the two notations mean the same color.
| HEX | #6666AA |
|---|---|
| RGB | 102, 102, 170 |
| HSL | 240°, 29%, 53% |
| CMYK | 40%, 40%, 0%, 33% |
| Relative luminance | 0.15 |
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Text contrast
Aa
On white
5.19:1 Passes AA
Aa
On black
4.05:1 Below AA
Colours that work with it
Complement
#AAAA64
Analogous
#6487AA#8764AA
Triadic
#AA6464#64AA64
Shade scale
50100200300400500600700800
Seen with colour blindness
ProtanopiaDeuteranopiaTritanopia
How to read this
- A hex code writes red, green and blue as two hexadecimal digits each. #ff0000 is red at full strength and the others at zero.
- HSL states hue (0–360°), saturation and lightness. Nudging a colour brighter means changing one number, which is why it is easier to work with by hand.
- Text contrast follows WCAG. Body-size text needs 4.5:1 or better, and 21:1 between white and black is the maximum possible.
- The colour-blindness row computes how this colour appears under three types of colour vision deficiency — the reason never to encode information in colour alone.
Frequently asked questions
Q. Are #66a and #6666AA the same color?
Yes. CSS doubles each digit of a three-digit hex, so #66a expands to #6666AA. Only 4,096 colors can be written in three digits, and this is one of them.
Q. What text color works on #6666AA?
White text. Contrast against white is 5.19:1 and against black 4.05:1, so pick the larger one — WCAG asks for 4.5:1 at body size.
Q. Which named color is closest to #6666AA?
Royal purple. It is not an exact match, so where color matters use the hex code itself rather than the name.