#51BEF4#51BEF4

#51BEF4 is a light, vivid cyan. Relative luminance 0.451; OKLCH L 76.0% C 0.125 H 233.4°. Best body text is #000000 at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#51BEF4
RGB	rgb(81, 190, 244)
HSL	hsl(200, 88%, 64%)
HSV	hsv(200, 67%, 96%)
CMYK	cmyk(66.8%, 22.1%, 0%, 4.3%)
CIE-LAB	lab(72.96, -14.69, -35.88)
CIE-LCH	lch(72.96, 38.77, 247.74°)
OKLab	oklab(76.05% -0.0747 -0.1007)
OKLCH	oklch(76.05% 0.125 233.4)
XYZ	xyz(38.1295, 45.1038, 92.2668)
Luminance	0.4511 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BEF4 #F48751

analogous

#51F4D8 #51BEF4 #516CF4

triadic

#51BEF4 #F451BE #BEF451

tetradic

#51BEF4 #D851F4 #F48751 #6CF451

square

#51BEF4 #D851F4 #F48751 #6CF451

split-complementary

#51BEF4 #F4516C #F4D851

monochromatic

#0C83BF #17A8F0 #51BEF4 #8BD4F8 #C4E9FB

Accessibility & contrast

On white

2.10

#51BEF4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.02

#51BEF4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEF4

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BEF4	#FFFFFF	#000000	##000000
##51BEF4	1.00	2.10	10.02	10.02
#FFFFFF	2.10	1.00	21.00	21.00
#000000	10.02	21.00	1.00	1.00
##000000	10.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4BCF7

Deuteranopia (green-blind)

#8DACF3

Tritanopia (blue-blind)

#00CCD0

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51bef4;
/* rgb */ color: rgb(81, 190, 244);
/* oklch */ color: oklch(76.0% 0.125 233.4);

Tailwind

colors: {
  custom: {
    50: '#93d1f8',
    500: '#51bef4',
    950: '#000000',
  },
}

SCSS

$custom: #51bef4;
$custom-light: #93d1f8;
$custom-dark: #000000;

JSON

{
  "hex": "#51bef4",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 244
  },
  "hsl": {
    "h": 199.877,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.76047,
    "c": 0.12536,
    "h": 233.4
  },
  "luminance": 0.45108
}

Semantic roles & 50–950 ramp

primary

#51BEF4

secondary

#EDC7B4

accent

#4C01E5

background

#F9FCFF

surface

#F2F9FF

border

#CCD2D7

text

#0E1417

muted

#7E8285

Preview Lab

Preview with #51BEF4

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

Preview Lab → · Contrast checker → · Palette generator →