#51C4DD#51C4DD

#51C4DD is a light, moderate cyan. Relative luminance 0.465; OKLCH L 76.5% C 0.108 H 214.6°. Best body text is #000000 at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#51C4DD
RGB	rgb(81, 196, 221)
HSL	hsl(191, 67%, 59%)
HSV	hsv(191, 63%, 87%)
CMYK	cmyk(63.3%, 11.3%, 0%, 13.3%)
CIE-LAB	lab(73.83, -24.85, -22.10)
CIE-LCH	lch(73.83, 33.26, 221.64°)
OKLab	oklab(76.46% -0.0891 -0.0614)
OKLCH	oklch(76.46% 0.108 214.6)
XYZ	xyz(36.1790, 46.4458, 75.4508)
Luminance	0.4645 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4DD #DD6A51

analogous

#51DDB0 #51C4DD #517EDD

triadic

#51C4DD #DD51C4 #C4DD51

tetradic

#51C4DD #B051DD #DD6A51 #7EDD51

square

#51C4DD #B051DD #DD6A51 #7EDD51

split-complementary

#51C4DD #DD517E #DDB051

monochromatic

#1D8196 #27ACC9 #51C4DD #84D5E7 #B7E7F1

Accessibility & contrast

On white

2.04

#51C4DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.29

#51C4DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4DD

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4DD	#FFFFFF	#000000	##000000
##51C4DD	1.00	2.04	10.29	10.29
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.29	21.00	1.00	1.00
##000000	10.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2BEDE

Deuteranopia (green-blind)

#9EAFDD

Tritanopia (blue-blind)

#00CECC

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #51c4dd;
/* rgb */ color: rgb(81, 196, 221);
/* oklch */ color: oklch(76.5% 0.108 214.6);

Tailwind

colors: {
  custom: {
    50: '#90d6e7',
    500: '#51c4dd',
    950: '#000000',
  },
}

SCSS

$custom: #51c4dd;
$custom-light: #90d6e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4dd",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 221
  },
  "hsl": {
    "h": 190.714,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.76464,
    "c": 0.1082,
    "h": 214.6
  },
  "luminance": 0.4645
}

Semantic roles & 50–950 ramp

primary

#51C4DD

secondary

#E0B3AA

accent

#5C3EEA

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4DD

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

Preview Lab → · Contrast checker → · Palette generator →