#51BCDF#51BCDF

#51BCDF is a light, moderate cyan. Relative luminance 0.430; OKLCH L 74.7% C 0.109 H 222.8°. Best body text is #000000 at 9.61:1 contrast (WCAG AA passes).

Color values

HEX	#51BCDF
RGB	rgb(81, 188, 223)
HSL	hsl(195, 69%, 60%)
HSV	hsv(195, 64%, 87%)
CMYK	cmyk(63.7%, 15.7%, 0%, 12.5%)
CIE-LAB	lab(71.58, -20.19, -26.62)
CIE-LCH	lch(71.58, 33.41, 232.83°)
OKLab	oklab(74.68% -0.0801 -0.0742)
OKLCH	oklch(74.68% 0.109 222.8)
XYZ	xyz(34.6905, 43.0398, 76.2770)
Luminance	0.4304 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCDF #DF7451

analogous

#51DFBB #51BCDF #5175DF

triadic

#51BCDF #DF51BC #BCDF51

tetradic

#51BCDF #BB51DF #DF7451 #75DF51

square

#51BCDF #BB51DF #DF7451 #75DF51

split-complementary

#51BCDF #DF5175 #DFBB51

monochromatic

#1C7B99 #26A4CD #51BCDF #85D0E9 #B8E4F2

Accessibility & contrast

On white

2.19

#51BCDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.61

#51BCDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCDF

9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCDF	#FFFFFF	#000000	##000000
##51BCDF	1.00	2.19	9.61	9.61
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.61	21.00	1.00	1.00
##000000	9.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B8E1

Deuteranopia (green-blind)

#94A9DF

Tritanopia (blue-blind)

#00C7C7

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcdf;
/* rgb */ color: rgb(81, 188, 223);
/* oklch */ color: oklch(74.7% 0.109 222.8);

Tailwind

colors: {
  custom: {
    50: '#90d0e9',
    500: '#51bcdf',
    950: '#000000',
  },
}

SCSS

$custom: #51bcdf;
$custom-light: #90d0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcdf",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 223
  },
  "hsl": {
    "h": 194.789,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.74682,
    "c": 0.10922,
    "h": 222.8
  },
  "luminance": 0.43043
}

Semantic roles & 50–950 ramp

primary

#51BCDF

secondary

#E1B8AA

accent

#673CEC

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCDF

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

Preview Lab → · Contrast checker → · Palette generator →