#51A0EB#51A0EB

#51A0EB is a light, vivid cyan. Relative luminance 0.329; OKLCH L 68.9% C 0.136 H 249.4°. Best body text is #000000 at 7.58:1 contrast (WCAG AA passes).

Color values

HEX	#51A0EB
RGB	rgb(81, 160, 235)
HSL	hsl(209, 79%, 62%)
HSV	hsv(209, 66%, 92%)
CMYK	cmyk(65.5%, 31.9%, 0%, 7.8%)
CIE-LAB	lab(64.07, -1.12, -44.87)
CIE-LCH	lch(64.07, 44.88, 268.57°)
OKLab	oklab(68.88% -0.0478 -0.127)
OKLCH	oklch(68.88% 0.136 249.4)
XYZ	xyz(30.9540, 32.8859, 83.2975)
Luminance	0.3289 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A0EB #EB9C51

analogous

#51EBE9 #51A0EB #5153EB

triadic

#51A0EB #EB51A0 #A0EB51

tetradic

#51A0EB #E951EB #EB9C51 #53EB51

square

#51A0EB #E951EB #EB9C51 #53EB51

split-complementary

#51A0EB #EB5153 #EBE951

monochromatic

#1463AE #1A82E5 #51A0EB #88BEF1 #BFDCF8

Accessibility & contrast

On white

2.77

#51A0EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.58

#51A0EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A0EB

7.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A0EB	#FFFFFF	#000000	##000000
##51A0EB	1.00	2.77	7.58	7.58
#FFFFFF	2.77	1.00	21.00	21.00
#000000	7.58	21.00	1.00	1.00
##000000	7.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7FA3EE

Deuteranopia (green-blind)

#6A95EA

Tritanopia (blue-blind)

#00B2BB

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #51a0eb;
/* rgb */ color: rgb(81, 160, 235);
/* oklch */ color: oklch(68.9% 0.136 249.4);

Tailwind

colors: {
  custom: {
    50: '#91bbf2',
    500: '#51a0eb',
    950: '#000000',
  },
}

SCSS

$custom: #51a0eb;
$custom-light: #91bbf2;
$custom-dark: #000000;

JSON

{
  "hex": "#51a0eb",
  "rgb": {
    "r": 81,
    "g": 160,
    "b": 235
  },
  "hsl": {
    "h": 209.221,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.68884,
    "c": 0.1357,
    "h": 249.4
  },
  "luminance": 0.32889
}

Semantic roles & 50–950 ramp

primary

#51A0EB

secondary

#E8CBB0

accent

#700ADC

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1117

muted

#7E8085

Preview Lab

Preview with #51A0EB

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

Preview Lab → · Contrast checker → · Palette generator →