#51BBD3#51BBD3

#51BBD3 is a light, moderate cyan. Relative luminance 0.420; OKLCH L 74.0% C 0.102 H 215.1°. Best body text is #000000 at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#51BBD3
RGB	rgb(81, 187, 211)
HSL	hsl(191, 60%, 57%)
HSV	hsv(191, 62%, 83%)
CMYK	cmyk(61.6%, 11.4%, 0%, 17.3%)
CIE-LAB	lab(70.86, -23.29, -21.18)
CIE-LCH	lch(70.86, 31.48, 222.28°)
OKLab	oklab(73.97% -0.0837 -0.0588)
OKLCH	oklch(73.97% 0.102 215.1)
XYZ	xyz(32.9167, 41.9897, 67.9855)
Luminance	0.4199 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBD3 #D36951

analogous

#51D3AA #51BBD3 #517AD3

triadic

#51BBD3 #D351BB #BBD351

tetradic

#51BBD3 #AA51D3 #D36951 #7AD351

square

#51BBD3 #AA51D3 #D36951 #7AD351

split-complementary

#51BBD3 #D3517A #D3AA51

monochromatic

#227587 #2F9FB8 #51BBD3 #82CEDF #B3E1EC

Accessibility & contrast

On white

2.23

#51BBD3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.40

#51BBD3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBD3

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBD3	#FFFFFF	#000000	##000000
##51BBD3	1.00	2.23	9.40	9.40
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.40	21.00	1.00	1.00
##000000	9.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB5D4

Deuteranopia (green-blind)

#97A7D3

Tritanopia (blue-blind)

#00C4C2

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #51bbd3;
/* rgb */ color: rgb(81, 187, 211);
/* oklch */ color: oklch(74.0% 0.102 215.1);

Tailwind

colors: {
  custom: {
    50: '#8fcfe0',
    500: '#51bbd3',
    950: '#000000',
  },
}

SCSS

$custom: #51bbd3;
$custom-light: #8fcfe0;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbd3",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 211
  },
  "hsl": {
    "h": 191.077,
    "s": 59.633,
    "l": 57.255
  },
  "oklch": {
    "l": 0.73965,
    "c": 0.10228,
    "h": 215.1
  },
  "luminance": 0.41993
}

Semantic roles & 50–950 ramp

primary

#51BBD3

secondary

#DAAFA6

accent

#6245E3

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BBD3

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

Preview Lab → · Contrast checker → · Palette generator →