#51BBDE#51BBDE

#51BBDE is a light, moderate cyan. Relative luminance 0.426; OKLCH L 74.4% C 0.109 H 223.0°. Best body text is #000000 at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#51BBDE
RGB	rgb(81, 187, 222)
HSL	hsl(195, 68%, 59%)
HSV	hsv(195, 64%, 87%)
CMYK	cmyk(63.5%, 15.8%, 0%, 12.9%)
CIE-LAB	lab(71.26, -19.98, -26.58)
CIE-LCH	lch(71.26, 33.25, 233.07°)
OKLab	oklab(74.41% -0.0795 -0.0741)
OKLCH	oklch(74.41% 0.109 223)
XYZ	xyz(34.3432, 42.5603, 75.4981)
Luminance	0.4256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBDE #DE7451

analogous

#51DEBB #51BBDE #5174DE

triadic

#51BBDE #DE51BB #BBDE51

tetradic

#51BBDE #BB51DE #DE7451 #74DE51

square

#51BBDE #BB51DE #DE7451 #74DE51

split-complementary

#51BBDE #DE5174 #DEBB51

monochromatic

#1D7998 #27A2CB #51BBDE #84CFE8 #B8E3F2

Accessibility & contrast

On white

2.21

#51BBDE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.51

#51BBDE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBDE

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBDE	#FFFFFF	#000000	##000000
##51BBDE	1.00	2.21	9.51	9.51
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.51	21.00	1.00	1.00
##000000	9.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B7E0

Deuteranopia (green-blind)

#93A8DE

Tritanopia (blue-blind)

#00C6C6

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbde;
/* rgb */ color: rgb(81, 187, 222);
/* oklch */ color: oklch(74.4% 0.109 223.0);

Tailwind

colors: {
  custom: {
    50: '#90cfe8',
    500: '#51bbde',
    950: '#000000',
  },
}

SCSS

$custom: #51bbde;
$custom-light: #90cfe8;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbde",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 222
  },
  "hsl": {
    "h": 194.894,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.74408,
    "c": 0.10866,
    "h": 223
  },
  "luminance": 0.42564
}

Semantic roles & 50–950 ramp

primary

#51BBDE

secondary

#E1B8AA

accent

#683DEB

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBDE

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

Preview Lab → · Contrast checker → · Palette generator →