#51ABD9#51ABD9

#51ABD9 is a light, moderate cyan. Relative luminance 0.359; OKLCH L 70.5% C 0.109 H 233.5°. Best body text is #000000 at 8.18:1 contrast (WCAG AA passes).

Color values

HEX#51ABD9
RGBrgb(81, 171, 217)
HSLhsl(200, 64%, 58%)
HSVhsv(200, 63%, 85%)
CMYKcmyk(62.7%, 21.2%, 0%, 14.9%)
CIE-LABlab(66.43, -13.08, -31.27)
CIE-LCHlch(66.43, 33.90, 247.31°)
OKLaboklab(70.49% -0.0647 -0.0876)
OKLCHoklch(70.49% 0.109 233.5)
XYZxyz(30.4758, 35.8818, 70.9520)
Luminance0.3589 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51ABD9 #D97F51
analogous
#51D9C3 #51ABD9 #5167D9
triadic
#51ABD9 #D951AB #ABD951
tetradic
#51ABD9 #C351D9 #D97F51 #67D951
square
#51ABD9 #C351D9 #D97F51 #67D951
split-complementary
#51ABD9 #D95167 #D9C351
monochromatic
#1F6A90 #2A8FC2 #51ABD9 #83C3E4 #B5DBEF

Accessibility & contrast

On white

2.57
#51ABD9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.18
#51ABD9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ABD9
8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51ABD9#FFFFFF#000000##000000
##51ABD91.002.578.188.18
#FFFFFF2.571.0021.0021.00
#0000008.1821.001.001.00
##0000008.1821.001.001.00

Color blindness preview

Protanopia (red-blind)
#95A9DB
Deuteranopia (green-blind)
#829BD8
Tritanopia (blue-blind)
#00B7BA
Achromatopsia (no color)
#A2A2A2

Design tokens & code

CSS
--color: #51abd9;
/* rgb */ color: rgb(81, 171, 217);
/* oklch */ color: oklch(70.5% 0.109 233.5);
Tailwind
colors: {
  custom: {
    50: '#8ec4e5',
    500: '#51abd9',
    950: '#000000',
  },
}
SCSS
$custom: #51abd9;
$custom-light: #8ec4e5;
$custom-dark: #000000;
JSON
{
  "hex": "#51abd9",
  "rgb": {
    "r": 81,
    "g": 171,
    "b": 217
  },
  "hsl": {
    "h": 200.294,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.70494,
    "c": 0.10887,
    "h": 233.5
  },
  "luminance": 0.35885
}

Semantic roles & 50–950 ramp

primary
#51ABD9
secondary
#DEBAA8
accent
#7941E7
background
#F9FCFE
surface
#F2F8FC
border
#CCD1D5
text
#0D1215
muted
#7E8184

Preview Lab

Preview with #51ABD9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#51ABD9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva