#51BBD5#51BBD5

#51BBD5 is a light, moderate cyan. Relative luminance 0.421; OKLCH L 74.0% C 0.103 H 216.6°. Best body text is #000000 at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD5
RGB	rgb(81, 187, 213)
HSL	hsl(192, 61%, 58%)
HSV	hsv(192, 62%, 84%)
CMYK	cmyk(62%, 12.2%, 0%, 16.5%)
CIE-LAB	lab(70.93, -22.69, -22.16)
CIE-LCH	lch(70.93, 31.72, 224.32°)
OKLab	oklab(74.04% -0.0829 -0.0616)
OKLCH	oklch(74.04% 0.103 216.6)
XYZ	xyz(33.1690, 42.0906, 69.3142)
Luminance	0.4209 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD5 #D56B51

analogous

#51D5AD #51BBD5 #5179D5

triadic

#51BBD5 #D551BB #BBD551

tetradic

#51BBD5 #AD51D5 #D56B51 #79D551

square

#51BBD5 #AD51D5 #D56B51 #79D551

split-complementary

#51BBD5 #D55179 #D5AD51

monochromatic

#21768A #2DA0BC #51BBD5 #82CEE1 #B4E2ED

Accessibility & contrast

On white

2.23

#51BBD5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.42

#51BBD5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD5

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD5	#FFFFFF	#000000	##000000
##51BBD5	1.00	2.23	9.42	9.42
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.42	21.00	1.00	1.00
##000000	9.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B6D6

Deuteranopia (green-blind)

#96A7D5

Tritanopia (blue-blind)

#00C4C3

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bbd5;
/* rgb */ color: rgb(81, 187, 213);
/* oklch */ color: oklch(74.0% 0.103 216.6);

Tailwind

colors: {
  custom: {
    50: '#8fcfe2',
    500: '#51bbd5',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd5;
$custom-light: #8fcfe2;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd5",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 213
  },
  "hsl": {
    "h": 191.818,
    "s": 61.111,
    "l": 57.647
  },
  "oklch": {
    "l": 0.74043,
    "c": 0.10327,
    "h": 216.6
  },
  "luminance": 0.42094
}

Semantic roles & 50–950 ramp

primary

#51BBD5

secondary

#DBB1A6

accent

#6344E4

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BBD5

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

Preview Lab → · Contrast checker → · Palette generator →