#51B4CD#51B4CD

#51B4CD is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.1% C 0.098 H 217.0°. Best body text is #000000 at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#51B4CD
RGB	rgb(81, 180, 205)
HSL	hsl(192, 55%, 56%)
HSV	hsv(192, 60%, 80%)
CMYK	cmyk(60.5%, 12.2%, 0%, 19.6%)
CIE-LAB	lab(68.60, -21.50, -21.33)
CIE-LCH	lch(68.60, 30.29, 224.77°)
OKLab	oklab(72.08% -0.0786 -0.0592)
OKLCH	oklch(72.08% 0.098 217)
XYZ	xyz(30.7296, 38.7965, 63.6148)
Luminance	0.3880 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4CD #CD6A51

analogous

#51CDA8 #51B4CD #5176CD

triadic

#51B4CD #CD51B4 #B4CD51

tetradic

#51B4CD #A851CD #CD6A51 #76CD51

square

#51B4CD #A851CD #CD6A51 #76CD51

split-complementary

#51B4CD #CD5176 #CDA851

monochromatic

#256D7F #3296AF #51B4CD #81C8DB #B0DDE8

Accessibility & contrast

On white

2.40

#51B4CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.76

#51B4CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4CD

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4CD	#FFFFFF	#000000	##000000
##51B4CD	1.00	2.40	8.76	8.76
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.76	21.00	1.00	1.00
##000000	8.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3AFCE

Deuteranopia (green-blind)

#91A2CD

Tritanopia (blue-blind)

#00BDBC

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b4cd;
/* rgb */ color: rgb(81, 180, 205);
/* oklch */ color: oklch(72.1% 0.098 217.0);

Tailwind

colors: {
  custom: {
    50: '#8ecadc',
    500: '#51b4cd',
    950: '#000000',
  },
}

SCSS

$custom: #51b4cd;
$custom-light: #8ecadc;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4cd",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 205
  },
  "hsl": {
    "h": 192.097,
    "s": 55.357,
    "l": 56.078
  },
  "oklch": {
    "l": 0.72082,
    "c": 0.09845,
    "h": 217
  },
  "luminance": 0.388
}

Semantic roles & 50–950 ramp

primary

#51B4CD

secondary

#D7AEA3

accent

#6749DF

background

#F9FCFD

surface

#F2F8FB

border

#CCD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51B4CD

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

Preview Lab → · Contrast checker → · Palette generator →