#51B4E7#51B4E7

#51B4E7 is a light, moderate cyan. Relative luminance 0.402; OKLCH L 73.2% C 0.118 H 234.1°. Best body text is #000000 at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#51B4E7
RGB	rgb(81, 180, 231)
HSL	hsl(200, 76%, 61%)
HSV	hsv(200, 65%, 91%)
CMYK	cmyk(64.9%, 22.1%, 0%, 9.4%)
CIE-LAB	lab(69.58, -13.49, -34.07)
CIE-LCH	lch(69.58, 36.64, 248.40°)
OKLab	oklab(73.19% -0.0691 -0.0955)
OKLCH	oklch(73.19% 0.118 234.1)
XYZ	xyz(34.1328, 40.1578, 81.5382)
Luminance	0.4016 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4E7 #E78451

analogous

#51E7CF #51B4E7 #5169E7

triadic

#51B4E7 #E751B4 #B4E751

tetradic

#51B4E7 #CF51E7 #E78451 #69E751

square

#51B4E7 #CF51E7 #E78451 #69E751

split-complementary

#51B4E7 #E75169 #E7CF51

monochromatic

#1776A7 #1E9CDC #51B4E7 #87CBEE #BDE2F6

Accessibility & contrast

On white

2.33

#51B4E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.03

#51B4E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4E7

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4E7	#FFFFFF	#000000	##000000
##51B4E7	1.00	2.33	9.03	9.03
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.03	21.00	1.00	1.00
##000000	9.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB2E9

Deuteranopia (green-blind)

#87A3E6

Tritanopia (blue-blind)

#00C1C5

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b4e7;
/* rgb */ color: rgb(81, 180, 231);
/* oklch */ color: oklch(73.2% 0.118 234.1);

Tailwind

colors: {
  custom: {
    50: '#91caee',
    500: '#51b4e7',
    950: '#000000',
  },
}

SCSS

$custom: #51b4e7;
$custom-light: #91caee;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4e7",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 231
  },
  "hsl": {
    "h": 200.4,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.73187,
    "c": 0.11792,
    "h": 234.1
  },
  "luminance": 0.40161
}

Semantic roles & 50–950 ramp

primary

#51B4E7

secondary

#E6C1AE

accent

#520ED8

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B4E7

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

Preview Lab → · Contrast checker → · Palette generator →