#51BFE4#51BFE4

#51BFE4 is a light, moderate cyan. Relative luminance 0.446; OKLCH L 75.6% C 0.112 H 223.6°. Best body text is #000000 at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#51BFE4
RGB	rgb(81, 191, 228)
HSL	hsl(195, 73%, 61%)
HSV	hsv(195, 64%, 89%)
CMYK	cmyk(64.5%, 16.2%, 0%, 10.6%)
CIE-LAB	lab(72.63, -20.20, -27.73)
CIE-LCH	lch(72.63, 34.31, 233.92°)
OKLab	oklab(75.58% -0.0813 -0.0774)
OKLCH	oklch(75.58% 0.112 223.6)
XYZ	xyz(36.0221, 44.6085, 80.0956)
Luminance	0.4461 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFE4 #E47651

analogous

#51E4BF #51BFE4 #5175E4

triadic

#51BFE4 #E451BF #BFE451

tetradic

#51BFE4 #BF51E4 #E47651 #75E451

square

#51BFE4 #BF51E4 #E47651 #75E451

split-complementary

#51BFE4 #E45175 #E4BF51

monochromatic

#197FA2 #21A9D7 #51BFE4 #86D2EC #BBE6F4

Accessibility & contrast

On white

2.12

#51BFE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.92

#51BFE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFE4

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFE4	#FFFFFF	#000000	##000000
##51BFE4	1.00	2.12	9.92	9.92
#FFFFFF	2.12	1.00	21.00	21.00
#000000	9.92	21.00	1.00	1.00
##000000	9.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABBE6

Deuteranopia (green-blind)

#95ACE4

Tritanopia (blue-blind)

#00CACB

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51bfe4;
/* rgb */ color: rgb(81, 191, 228);
/* oklch */ color: oklch(75.6% 0.112 223.6);

Tailwind

colors: {
  custom: {
    50: '#91d2ec',
    500: '#51bfe4',
    950: '#000000',
  },
}

SCSS

$custom: #51bfe4;
$custom-light: #91d2ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfe4",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 228
  },
  "hsl": {
    "h": 195.102,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.75584,
    "c": 0.11224,
    "h": 223.6
  },
  "luminance": 0.44612
}

Semantic roles & 50–950 ramp

primary

#51BFE4

secondary

#E4BBAC

accent

#4210D5

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFE4

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

Preview Lab → · Contrast checker → · Palette generator →