#51B2E1#51B2E1

#51B2E1 is a light, moderate cyan. Relative luminance 0.390; OKLCH L 72.5% C 0.113 H 232.4°. Best body text is #000000 at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#51B2E1
RGB	rgb(81, 178, 225)
HSL	hsl(200, 71%, 60%)
HSV	hsv(200, 64%, 88%)
CMYK	cmyk(64%, 20.9%, 0%, 11.8%)
CIE-LAB	lab(68.77, -14.32, -32.05)
CIE-LCH	lch(68.77, 35.10, 245.93°)
OKLab	oklab(72.46% -0.0691 -0.0898)
OKLCH	oklch(72.46% 0.113 232.4)
XYZ	xyz(32.8990, 39.0230, 77.0179)
Luminance	0.3903 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2E1 #E18051

analogous

#51E1C8 #51B2E1 #516AE1

triadic

#51B2E1 #E151B2 #B2E151

tetradic

#51B2E1 #C851E1 #E18051 #6AE151

square

#51B2E1 #C851E1 #E18051 #6AE151

split-complementary

#51B2E1 #E1516A #E1C851

monochromatic

#1B729D #2498D1 #51B2E1 #85C9EA #B9E0F3

Accessibility & contrast

On white

2.38

#51B2E1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.81

#51B2E1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2E1

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2E1	#FFFFFF	#000000	##000000
##51B2E1	1.00	2.38	8.81	8.81
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.81	21.00	1.00	1.00
##000000	8.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB0E3

Deuteranopia (green-blind)

#87A1E0

Tritanopia (blue-blind)

#00BFC2

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b2e1;
/* rgb */ color: rgb(81, 178, 225);
/* oklch */ color: oklch(72.5% 0.113 232.4);

Tailwind

colors: {
  custom: {
    50: '#90c9ea',
    500: '#51b2e1',
    950: '#000000',
  },
}

SCSS

$custom: #51b2e1;
$custom-light: #90c9ea;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2e1",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 225
  },
  "hsl": {
    "h": 199.583,
    "s": 70.588,
    "l": 60
  },
  "oklch": {
    "l": 0.7246,
    "c": 0.1133,
    "h": 232.4
  },
  "luminance": 0.39026
}

Semantic roles & 50–950 ramp

primary

#51B2E1

secondary

#E3BDAB

accent

#753AED

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2E1

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

Preview Lab → · Contrast checker → · Palette generator →