#51B6EA#51B6EA

#51B6EA is a light, moderate cyan. Relative luminance 0.411; OKLCH L 73.8% C 0.120 H 234.2°. Best body text is #000000 at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#51B6EA
RGB	rgb(81, 182, 234)
HSL	hsl(200, 78%, 62%)
HSV	hsv(200, 65%, 92%)
CMYK	cmyk(65.4%, 22.2%, 0%, 8.2%)
CIE-LAB	lab(70.28, -13.61, -34.62)
CIE-LCH	lch(70.28, 37.20, 248.55°)
OKLab	oklab(73.78% -0.0701 -0.0971)
OKLCH	oklch(73.78% 0.12 234.2)
XYZ	xyz(34.9668, 41.1420, 83.9244)
Luminance	0.4115 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B6EA #EA8551

analogous

#51EAD2 #51B6EA #516AEA

triadic

#51B6EA #EA51B6 #B6EA51

tetradic

#51B6EA #D251EA #EA8551 #6AEA51

square

#51B6EA #D251EA #EA8551 #6AEA51

split-complementary

#51B6EA #EA516A #EAD251

monochromatic

#1578AC #1B9FE2 #51B6EA #88CDF1 #BEE4F7

Accessibility & contrast

On white

2.28

#51B6EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.23

#51B6EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B6EA

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B6EA	#FFFFFF	#000000	##000000
##51B6EA	1.00	2.28	9.23	9.23
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.23	21.00	1.00	1.00
##000000	9.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB4EC

Deuteranopia (green-blind)

#88A5E9

Tritanopia (blue-blind)

#00C4C7

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #51b6ea;
/* rgb */ color: rgb(81, 182, 234);
/* oklch */ color: oklch(73.8% 0.120 234.2);

Tailwind

colors: {
  custom: {
    50: '#91cbf1',
    500: '#51b6ea',
    950: '#000000',
  },
}

SCSS

$custom: #51b6ea;
$custom-light: #91cbf1;
$custom-dark: #000000;

JSON

{
  "hex": "#51b6ea",
  "rgb": {
    "r": 81,
    "g": 182,
    "b": 234
  },
  "hsl": {
    "h": 200.392,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.73778,
    "c": 0.1198,
    "h": 234.2
  },
  "luminance": 0.41146
}

Semantic roles & 50–950 ramp

primary

#51B6EA

secondary

#E8C2AF

accent

#510BDB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B6EA

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

Preview Lab → · Contrast checker → · Palette generator →