#51BEE4#51BEE4

#51BEE4 is a light, moderate cyan. Relative luminance 0.442; OKLCH L 75.4% C 0.112 H 224.4°. Best body text is #000000 at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#51BEE4
RGB	rgb(81, 190, 228)
HSL	hsl(196, 73%, 61%)
HSV	hsv(196, 64%, 89%)
CMYK	cmyk(64.5%, 16.7%, 0%, 10.6%)
CIE-LAB	lab(72.34, -19.69, -28.17)
CIE-LCH	lch(72.34, 34.37, 235.05°)
OKLab	oklab(75.35% -0.0803 -0.0786)
OKLCH	oklch(75.35% 0.112 224.4)
XYZ	xyz(35.8048, 44.1739, 80.0232)
Luminance	0.4418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BEE4 #E47751

analogous

#51E4C0 #51BEE4 #5174E4

triadic

#51BEE4 #E451BE #BEE451

tetradic

#51BEE4 #C051E4 #E47751 #74E451

square

#51BEE4 #C051E4 #E47751 #74E451

split-complementary

#51BEE4 #E45174 #E4C051

monochromatic

#197EA2 #21A8D7 #51BEE4 #86D2EC #BBE6F4

Accessibility & contrast

On white

2.14

#51BEE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.84

#51BEE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEE4

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BEE4	#FFFFFF	#000000	##000000
##51BEE4	1.00	2.14	9.84	9.84
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.84	21.00	1.00	1.00
##000000	9.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9BAE6

Deuteranopia (green-blind)

#94ABE4

Tritanopia (blue-blind)

#00CACA

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bee4;
/* rgb */ color: rgb(81, 190, 228);
/* oklch */ color: oklch(75.4% 0.112 224.4);

Tailwind

colors: {
  custom: {
    50: '#91d1ec',
    500: '#51bee4',
    950: '#000000',
  },
}

SCSS

$custom: #51bee4;
$custom-light: #91d1ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51bee4",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 228
  },
  "hsl": {
    "h": 195.51,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.75353,
    "c": 0.11239,
    "h": 224.4
  },
  "luminance": 0.44178
}

Semantic roles & 50–950 ramp

primary

#51BEE4

secondary

#E4BBAC

accent

#4310D5

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BEE4

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

Preview Lab → · Contrast checker → · Palette generator →