#51B4E2#51B4E2

#51B4E2 is a light, moderate cyan. Relative luminance 0.399; OKLCH L 73.0% C 0.113 H 231.4°. Best body text is #000000 at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#51B4E2
RGB	rgb(81, 180, 226)
HSL	hsl(199, 71%, 60%)
HSV	hsv(199, 64%, 89%)
CMYK	cmyk(64.2%, 20.4%, 0%, 11.4%)
CIE-LAB	lab(69.38, -15.07, -31.64)
CIE-LCH	lch(69.38, 35.05, 244.54°)
OKLab	oklab(72.96% -0.0708 -0.0886)
OKLCH	oklch(72.96% 0.113 231.4)
XYZ	xyz(33.4367, 39.8794, 77.8721)
Luminance	0.3988 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4E2 #E27F51

analogous

#51E2C7 #51B4E2 #516CE2

triadic

#51B4E2 #E251B4 #B4E251

tetradic

#51B4E2 #C751E2 #E27F51 #6CE251

square

#51B4E2 #C751E2 #E27F51 #6CE251

split-complementary

#51B4E2 #E2516C #E2C751

monochromatic

#1A749E #239BD3 #51B4E2 #85CBEB #BAE1F3

Accessibility & contrast

On white

2.34

#51B4E2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.98

#51B4E2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4E2

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4E2	#FFFFFF	#000000	##000000
##51B4E2	1.00	2.34	8.98	8.98
#FFFFFF	2.34	1.00	21.00	21.00
#000000	8.98	21.00	1.00	1.00
##000000	8.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB2E4

Deuteranopia (green-blind)

#89A3E1

Tritanopia (blue-blind)

#00C1C3

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b4e2;
/* rgb */ color: rgb(81, 180, 226);
/* oklch */ color: oklch(73.0% 0.113 231.4);

Tailwind

colors: {
  custom: {
    50: '#90caeb',
    500: '#51b4e2',
    950: '#000000',
  },
}

SCSS

$custom: #51b4e2;
$custom-light: #90caeb;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4e2",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 226
  },
  "hsl": {
    "h": 199.034,
    "s": 71.429,
    "l": 60.196
  },
  "oklch": {
    "l": 0.72964,
    "c": 0.11343,
    "h": 231.4
  },
  "luminance": 0.39883
}

Semantic roles & 50–950 ramp

primary

#51B4E2

secondary

#E3BDAC

accent

#4F12D3

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B4E2

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

Preview Lab → · Contrast checker → · Palette generator →