#55FFFF
#55FFFF
Blues · #5ff is the three-digit shorthand for #55FFFF. In CSS the two notations mean the same color.
| HEX | #55FFFF |
|---|---|
| RGB | 85, 255, 255 |
| HSL | 180°, 100%, 67% |
| CMYK | 67%, 0%, 0%, 0% |
| Relative luminance | 0.81 |
Tap a code to copy it
Text contrast
Aa
On white
1.23:1 Below AA
Aa
On black
17.13:1 Passes AA
Colours that work with it
Complement
#FF5757
Analogous
#57FFAB#57ABFF
Triadic
#FF57FF#FFFF57
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 #5ff and #55FFFF the same color?
Yes. CSS doubles each digit of a three-digit hex, so #5ff expands to #55FFFF. Only 4,096 colors can be written in three digits, and this is one of them.
Q. What text color works on #55FFFF?
Black text. Contrast against white is 1.23:1 and against black 17.13:1, so pick the larger one — WCAG asks for 4.5:1 at body size.
Q. Which named color is closest to #55FFFF?
Aquamarine. It is not an exact match, so where color matters use the hex code itself rather than the name.