#51C3DE#51C3DE

#51C3DE is a light, moderate cyan. Relative luminance 0.461; OKLCH L 76.3% C 0.109 H 216.1°. Best body text is #000000 at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#51C3DE
RGB	rgb(81, 195, 222)
HSL	hsl(191, 68%, 59%)
HSV	hsv(191, 64%, 87%)
CMYK	cmyk(63.5%, 12.2%, 0%, 12.9%)
CIE-LAB	lab(73.58, -24.05, -23.03)
CIE-LCH	lch(73.58, 33.30, 223.75°)
OKLab	oklab(76.27% -0.0877 -0.064)
OKLCH	oklch(76.27% 0.109 216.1)
XYZ	xyz(36.0879, 46.0496, 76.0797)
Luminance	0.4605 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C3DE #DE6C51

analogous

#51DEB2 #51C3DE #517DDE

triadic

#51C3DE #DE51C3 #C3DE51

tetradic

#51C3DE #B251DE #DE6C51 #7DDE51

square

#51C3DE #B251DE #DE6C51 #7DDE51

split-complementary

#51C3DE #DE517D #DEB251

monochromatic

#1D8098 #27ACCB #51C3DE #84D5E8 #B8E6F2

Accessibility & contrast

On white

2.06

#51C3DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.21

#51C3DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C3DE

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C3DE	#FFFFFF	#000000	##000000
##51C3DE	1.00	2.06	10.21	10.21
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.21	21.00	1.00	1.00
##000000	10.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1BDE0

Deuteranopia (green-blind)

#9CAEDE

Tritanopia (blue-blind)

#00CDCB

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #51c3de;
/* rgb */ color: rgb(81, 195, 222);
/* oklch */ color: oklch(76.3% 0.109 216.1);

Tailwind

colors: {
  custom: {
    50: '#90d5e8',
    500: '#51c3de',
    950: '#000000',
  },
}

SCSS

$custom: #51c3de;
$custom-light: #90d5e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51c3de",
  "rgb": {
    "r": 81,
    "g": 195,
    "b": 222
  },
  "hsl": {
    "h": 191.489,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.7627,
    "c": 0.10858,
    "h": 216.1
  },
  "luminance": 0.46053
}

Semantic roles & 50–950 ramp

primary

#51C3DE

secondary

#E1B4AA

accent

#5E3DEB

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C3DE

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

Preview Lab → · Contrast checker → · Palette generator →