#51C1EB#51C1EB

#51C1EB is a light, moderate cyan. Relative luminance 0.459; OKLCH L 76.3% C 0.117 H 226.3°. Best body text is #000000 at 10.18:1 contrast (WCAG AA passes).

Color values

HEX#51C1EB
RGBrgb(81, 193, 235)
HSLhsl(196, 79%, 62%)
HSVhsv(196, 66%, 92%)
CMYKcmyk(65.5%, 17.9%, 0%, 7.8%)
CIE-LABlab(73.47, -19.08, -30.23)
CIE-LCHlch(73.47, 35.75, 237.74°)
OKLaboklab(76.34% -0.0808 -0.0845)
OKLCHoklch(76.34% 0.117 226.3)
XYZxyz(37.4527, 45.8834, 85.4637)
Luminance0.4589 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C1EB #EB7B51
analogous
#51EBC8 #51C1EB #5174EB
triadic
#51C1EB #EB51C1 #C1EB51
tetradic
#51C1EB #C851EB #EB7B51 #74EB51
square
#51C1EB #C851EB #EB7B51 #74EB51
split-complementary
#51C1EB #EB5174 #EBC851
monochromatic
#1484AE #1AADE5 #51C1EB #88D5F1 #BFE8F8

Accessibility & contrast

On white

2.06
#51C1EB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.18
#51C1EB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C1EB
10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C1EB#FFFFFF#000000##000000
##51C1EB1.002.0610.1810.18
#FFFFFF2.061.0021.0021.00
#00000010.1821.001.001.00
##00000010.1821.001.001.00

Color blindness preview

Protanopia (red-blind)
#AABDED
Deuteranopia (green-blind)
#95AEEB
Tritanopia (blue-blind)
#00CDCF
Achromatopsia (no color)
#B4B4B4

Design tokens & code

CSS
--color: #51c1eb;
/* rgb */ color: rgb(81, 193, 235);
/* oklch */ color: oklch(76.3% 0.117 226.3);
Tailwind
colors: {
  custom: {
    50: '#92d3f1',
    500: '#51c1eb',
    950: '#000000',
  },
}
SCSS
$custom: #51c1eb;
$custom-light: #92d3f1;
$custom-dark: #000000;
JSON
{
  "hex": "#51c1eb",
  "rgb": {
    "r": 81,
    "g": 193,
    "b": 235
  },
  "hsl": {
    "h": 196.364,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.76339,
    "c": 0.1169,
    "h": 226.3
  },
  "luminance": 0.45887
}

Semantic roles & 50–950 ramp

primary
#51C1EB
secondary
#E8BFB0
accent
#430ADC
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51C1EB

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

Preview Lab → · Contrast checker → · Palette generator →

#51C1EB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva