#51C4DE#51C4DE

#51C4DE is a light, moderate cyan. Relative luminance 0.465; OKLCH L 76.5% C 0.109 H 215.3°. Best body text is #000000 at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#51C4DE
RGB	rgb(81, 196, 222)
HSL	hsl(191, 68%, 59%)
HSV	hsv(191, 64%, 87%)
CMYK	cmyk(63.5%, 11.7%, 0%, 12.9%)
CIE-LAB	lab(73.87, -24.56, -22.59)
CIE-LCH	lch(73.87, 33.36, 222.61°)
OKLab	oklab(76.5% -0.0887 -0.0628)
OKLCH	oklch(76.5% 0.109 215.3)
XYZ	xyz(36.3127, 46.4992, 76.1546)
Luminance	0.4650 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4DE #DE6B51

analogous

#51DEB2 #51C4DE #517EDE

triadic

#51C4DE #DE51C4 #C4DE51

tetradic

#51C4DE #B251DE #DE6B51 #7EDE51

square

#51C4DE #B251DE #DE6B51 #7EDE51

split-complementary

#51C4DE #DE517E #DEB251

monochromatic

#1D8198 #27ADCB #51C4DE #84D5E8 #B8E7F2

Accessibility & contrast

On white

2.04

#51C4DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.30

#51C4DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4DE

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4DE	#FFFFFF	#000000	##000000
##51C4DE	1.00	2.04	10.30	10.30
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.30	21.00	1.00	1.00
##000000	10.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2BEDF

Deuteranopia (green-blind)

#9DAFDE

Tritanopia (blue-blind)

#00CECC

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c4de;
/* rgb */ color: rgb(81, 196, 222);
/* oklch */ color: oklch(76.5% 0.109 215.3);

Tailwind

colors: {
  custom: {
    50: '#91d6e8',
    500: '#51c4de',
    950: '#000000',
  },
}

SCSS

$custom: #51c4de;
$custom-light: #91d6e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4de",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 222
  },
  "hsl": {
    "h": 191.064,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.76503,
    "c": 0.10868,
    "h": 215.3
  },
  "luminance": 0.46503
}

Semantic roles & 50–950 ramp

primary

#51C4DE

secondary

#E1B4AA

accent

#5D3DEB

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4DE

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

Preview Lab → · Contrast checker → · Palette generator →