#660000
#660000
Reds · #600 is the three-digit shorthand for #660000. In CSS the two notations mean the same color.
| HEX | #660000 |
|---|---|
| RGB | 102, 0, 0 |
| HSL | 0°, 100%, 20% |
| CMYK | 0%, 100%, 100%, 60% |
| Relative luminance | 0.03 |
Tap a code to copy it
Text contrast
Aa
On white
13.42:1 Passes AA
Aa
On black
1.56:1 Below AA
Colours that work with it
Complement
#006666
Analogous
#660033#663300
Triadic
#006600#000066
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 #600 and #660000 the same color?
Yes. CSS doubles each digit of a three-digit hex, so #600 expands to #660000. Only 4,096 colors can be written in three digits, and this is one of them.
Q. What text color works on #660000?
White text. Contrast against white is 13.42:1 and against black 1.56:1, so pick the larger one — WCAG asks for 4.5:1 at body size.
Q. Which named color is closest to #660000?
Blood red. It is not an exact match, so where color matters use the hex code itself rather than the name.