#51B3CA#51B3CA

#51B3CA is a light, moderate cyan. Relative luminance 0.383; OKLCH L 71.7% C 0.097 H 215.6°. Best body text is #000000 at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#51B3CA
RGB	rgb(81, 179, 202)
HSL	hsl(191, 53%, 55%)
HSV	hsv(191, 60%, 79%)
CMYK	cmyk(59.9%, 11.4%, 0%, 20.8%)
CIE-LAB	lab(68.21, -21.88, -20.28)
CIE-LCH	lch(68.21, 29.84, 222.83°)
OKLab	oklab(71.73% -0.0787 -0.0563)
OKLCH	oklch(71.73% 0.097 215.6)
XYZ	xyz(30.1698, 38.2508, 61.6588)
Luminance	0.3825 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B3CA #CA6851

analogous

#51CAA4 #51B3CA #5176CA

triadic

#51B3CA #CA51B3 #B3CA51

tetradic

#51B3CA #A451CA #CA6851 #76CA51

square

#51B3CA #A451CA #CA6851 #76CA51

split-complementary

#51B3CA #CA5176 #CAA451

monochromatic

#256B7B #3494AA #51B3CA #80C7D8 #AFDCE7

Accessibility & contrast

On white

2.43

#51B3CA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.65

#51B3CA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B3CA

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B3CA	#FFFFFF	#000000	##000000
##51B3CA	1.00	2.43	8.65	8.65
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.65	21.00	1.00	1.00
##000000	8.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3AECB

Deuteranopia (green-blind)

#91A1CA

Tritanopia (blue-blind)

#00BCBA

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #51b3ca;
/* rgb */ color: rgb(81, 179, 202);
/* oklch */ color: oklch(71.7% 0.097 215.6);

Tailwind

colors: {
  custom: {
    50: '#8dcada',
    500: '#51b3ca',
    950: '#000000',
  },
}

SCSS

$custom: #51b3ca;
$custom-light: #8dcada;
$custom-dark: #000000;

JSON

{
  "hex": "#51b3ca",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 202
  },
  "hsl": {
    "h": 191.405,
    "s": 53.304,
    "l": 55.49
  },
  "oklch": {
    "l": 0.71728,
    "c": 0.0968,
    "h": 215.6
  },
  "luminance": 0.38254
}

Semantic roles & 50–950 ramp

primary

#51B3CA

secondary

#D5ACA2

accent

#674BDD

background

#F9FCFD

surface

#F1F8FA

border

#CBD1D3

text

#0D1314

muted

#7E8283

Preview Lab

Preview with #51B3CA

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

Preview Lab → · Contrast checker → · Palette generator →