#51BFEB#51BFEB

#51BFEB is a light, moderate cyan. Relative luminance 0.450; OKLCH L 75.9% C 0.117 H 227.8°. Best body text is #000000 at 10.00:1 contrast (WCAG AA passes).

Color values

HEX	#51BFEB
RGB	rgb(81, 191, 235)
HSL	hsl(197, 79%, 62%)
HSV	hsv(197, 66%, 92%)
CMYK	cmyk(65.5%, 18.7%, 0%, 7.8%)
CIE-LAB	lab(72.90, -18.04, -31.12)
CIE-LCH	lch(72.90, 35.97, 239.89°)
OKLab	oklab(75.88% -0.0788 -0.087)
OKLCH	oklch(75.88% 0.117 227.8)
XYZ	xyz(37.0136, 45.0051, 85.3173)
Luminance	0.4501 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BFEB #EB7D51

analogous

#51EBCA #51BFEB #5172EB

triadic

#51BFEB #EB51BF #BFEB51

tetradic

#51BFEB #CA51EB #EB7D51 #72EB51

square

#51BFEB #CA51EB #EB7D51 #72EB51

split-complementary

#51BFEB #EB5172 #EBCA51

monochromatic

#1482AE #1AABE5 #51BFEB #88D3F1 #BFE7F8

Accessibility & contrast

On white

2.10

#51BFEB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.00

#51BFEB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BFEB

10.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BFEB	#FFFFFF	#000000	##000000
##51BFEB	1.00	2.10	10.00	10.00
#FFFFFF	2.10	1.00	21.00	21.00
#000000	10.00	21.00	1.00	1.00
##000000	10.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8BCED

Deuteranopia (green-blind)

#92ACEA

Tritanopia (blue-blind)

#00CCCD

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51bfeb;
/* rgb */ color: rgb(81, 191, 235);
/* oklch */ color: oklch(75.9% 0.117 227.8);

Tailwind

colors: {
  custom: {
    50: '#92d2f1',
    500: '#51bfeb',
    950: '#000000',
  },
}

SCSS

$custom: #51bfeb;
$custom-light: #92d2f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51bfeb",
  "rgb": {
    "r": 81,
    "g": 191,
    "b": 235
  },
  "hsl": {
    "h": 197.143,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.7588,
    "c": 0.11739,
    "h": 227.8
  },
  "luminance": 0.45009
}

Semantic roles & 50–950 ramp

primary

#51BFEB

secondary

#E8C0B0

accent

#460ADC

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BFEB

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

Preview Lab → · Contrast checker → · Palette generator →