#51BFE8#51BFE8

#51BFE8 is a light, moderate cyan. Relative luminance 0.448; OKLCH L 75.8% C 0.115 H 226.1°. Best body text is #000000 at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#51BFE8
RGB	rgb(81, 191, 232)
HSL	hsl(196, 77%, 61%)
HSV	hsv(196, 65%, 91%)
CMYK	cmyk(65.1%, 17.7%, 0%, 9%)
CIE-LAB	lab(72.78, -18.97, -29.67)
CIE-LCH	lch(72.78, 35.21, 237.40°)
OKLab	oklab(75.75% -0.0799 -0.0829)
OKLCH	oklch(75.75% 0.115 226.1)
XYZ	xyz(36.5838, 44.8332, 83.0539)
Luminance	0.4484 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFE8 #E87A51

analogous

#51E8C5 #51BFE8 #5174E8

triadic

#51BFE8 #E851BF #BFE851

tetradic

#51BFE8 #C551E8 #E87A51 #74E851

square

#51BFE8 #C551E8 #E87A51 #74E851

split-complementary

#51BFE8 #E85174 #E8C551

monochromatic

#1681A8 #1DAADE #51BFE8 #87D3EF #BDE7F6

Accessibility & contrast

On white

2.11

#51BFE8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.97

#51BFE8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFE8

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFE8	#FFFFFF	#000000	##000000
##51BFE8	1.00	2.11	9.97	9.97
#FFFFFF	2.11	1.00	21.00	21.00
#000000	9.97	21.00	1.00	1.00
##000000	9.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9BBEA

Deuteranopia (green-blind)

#94ACE8

Tritanopia (blue-blind)

#00CBCC

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51bfe8;
/* rgb */ color: rgb(81, 191, 232);
/* oklch */ color: oklch(75.8% 0.115 226.1);

Tailwind

colors: {
  custom: {
    50: '#91d2ef',
    500: '#51bfe8',
    950: '#000000',
  },
}

SCSS

$custom: #51bfe8;
$custom-light: #91d2ef;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfe8",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 232
  },
  "hsl": {
    "h": 196.291,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.75752,
    "c": 0.1151,
    "h": 226.1
  },
  "luminance": 0.44837
}

Semantic roles & 50–950 ramp

primary

#51BFE8

secondary

#E7BEAE

accent

#440DD9

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFE8

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

Preview Lab → · Contrast checker → · Palette generator →