#51C3E4#51C3E4

#51C3E4 is a light, moderate cyan. Relative luminance 0.464; OKLCH L 76.5% C 0.112 H 220.3°. Best body text is #000000 at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#51C3E4
RGB	rgb(81, 195, 228)
HSL	hsl(193, 73%, 61%)
HSV	hsv(193, 64%, 89%)
CMYK	cmyk(64.5%, 14.5%, 0%, 10.6%)
CIE-LAB	lab(73.79, -22.25, -25.95)
CIE-LCH	lch(73.79, 34.19, 229.39°)
OKLab	oklab(76.51% -0.0854 -0.0723)
OKLCH	oklch(76.51% 0.112 220.3)
XYZ	xyz(36.9063, 46.3770, 80.3904)
Luminance	0.4638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C3E4 #E47251

analogous

#51E4BB #51C3E4 #517AE4

triadic

#51C3E4 #E451C3 #C3E451

tetradic

#51C3E4 #BB51E4 #E47251 #7AE451

square

#51C3E4 #BB51E4 #E47251 #7AE451

split-complementary

#51C3E4 #E4517A #E4BB51

monochromatic

#1983A2 #21AED7 #51C3E4 #86D5EC #BBE8F4

Accessibility & contrast

On white

2.04

#51C3E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.28

#51C3E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C3E4

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C3E4	#FFFFFF	#000000	##000000
##51C3E4	1.00	2.04	10.28	10.28
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.28	21.00	1.00	1.00
##000000	10.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AFBEE6

Deuteranopia (green-blind)

#9AAFE4

Tritanopia (blue-blind)

#00CECD

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #51c3e4;
/* rgb */ color: rgb(81, 195, 228);
/* oklch */ color: oklch(76.5% 0.112 220.3);

Tailwind

colors: {
  custom: {
    50: '#91d5ec',
    500: '#51c3e4',
    950: '#000000',
  },
}

SCSS

$custom: #51c3e4;
$custom-light: #91d5ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51c3e4",
  "rgb": {
    "r": 81,
    "g": 195,
    "b": 228
  },
  "hsl": {
    "h": 193.469,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.7651,
    "c": 0.11189,
    "h": 220.3
  },
  "luminance": 0.46381
}

Semantic roles & 50–950 ramp

primary

#51C3E4

secondary

#E4B9AC

accent

#3C10D5

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C3E4

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

Preview Lab → · Contrast checker → · Palette generator →