#51B6EB#51B6EB

#51B6EB is a light, vivid cyan. Relative luminance 0.412; OKLCH L 73.8% C 0.121 H 234.7°. Best body text is #000000 at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#51B6EB
RGB	rgb(81, 182, 235)
HSL	hsl(201, 79%, 62%)
HSV	hsv(201, 66%, 92%)
CMYK	cmyk(65.5%, 22.6%, 0%, 7.8%)
CIE-LAB	lab(70.32, -13.29, -35.11)
CIE-LCH	lch(70.32, 37.54, 249.26°)
OKLab	oklab(73.82% -0.0698 -0.0985)
OKLCH	oklch(73.82% 0.121 234.7)
XYZ	xyz(35.1108, 41.1997, 84.6831)
Luminance	0.4120 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B6EB #EB8651

analogous

#51EBD3 #51B6EB #5169EB

triadic

#51B6EB #EB51B6 #B6EB51

tetradic

#51B6EB #D351EB #EB8651 #69EB51

square

#51B6EB #D351EB #EB8651 #69EB51

split-complementary

#51B6EB #EB5169 #EBD351

monochromatic

#1479AE #1A9FE5 #51B6EB #88CDF1 #BFE4F8

Accessibility & contrast

On white

2.27

#51B6EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.24

#51B6EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B6EB

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B6EB	#FFFFFF	#000000	##000000
##51B6EB	1.00	2.27	9.24	9.24
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.24	21.00	1.00	1.00
##000000	9.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB5EE

Deuteranopia (green-blind)

#87A5EA

Tritanopia (blue-blind)

#00C4C8

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #51b6eb;
/* rgb */ color: rgb(81, 182, 235);
/* oklch */ color: oklch(73.8% 0.121 234.7);

Tailwind

colors: {
  custom: {
    50: '#91cbf1',
    500: '#51b6eb',
    950: '#000000',
  },
}

SCSS

$custom: #51b6eb;
$custom-light: #91cbf1;
$custom-dark: #000000;

JSON

{
  "hex": "#51b6eb",
  "rgb": {
    "r": 81,
    "g": 182,
    "b": 235
  },
  "hsl": {
    "h": 200.649,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.73824,
    "c": 0.12072,
    "h": 234.7
  },
  "luminance": 0.41203
}

Semantic roles & 50–950 ramp

primary

#51B6EB

secondary

#E8C3B0

accent

#520ADC

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B6EB

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

Preview Lab → · Contrast checker → · Palette generator →