#51B7CC#51B7CC

#51B7CC is a light, moderate cyan. Relative luminance 0.400; OKLCH L 72.8% C 0.098 H 213.3°. Best body text is #000000 at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#51B7CC
RGB	rgb(81, 183, 204)
HSL	hsl(190, 55%, 56%)
HSV	hsv(190, 60%, 80%)
CMYK	cmyk(60.3%, 10.3%, 0%, 20%)
CIE-LAB	lab(69.45, -23.33, -19.49)
CIE-LCH	lch(69.45, 30.40, 219.88°)
OKLab	oklab(72.75% -0.0822 -0.0541)
OKLCH	oklch(72.75% 0.098 213.3)
XYZ	xyz(31.2215, 39.9728, 63.1852)
Luminance	0.3998 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B7CC #CC6651

analogous

#51CCA3 #51B7CC #5179CC

triadic

#51B7CC #CC51B7 #B7CC51

tetradic

#51B7CC #A351CC #CC6651 #79CC51

square

#51B7CC #A351CC #CC6651 #79CC51

split-complementary

#51B7CC #CC5179 #CCA351

monochromatic

#256F7E #3398AD #51B7CC #80CBDA #B0DEE8

Accessibility & contrast

On white

2.33

#51B7CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.00

#51B7CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B7CC

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B7CC	#FFFFFF	#000000	##000000
##51B7CC	1.00	2.33	9.00	9.00
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.00	21.00	1.00	1.00
##000000	9.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B1CD

Deuteranopia (green-blind)

#95A4CC

Tritanopia (blue-blind)

#00BFBD

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b7cc;
/* rgb */ color: rgb(81, 183, 204);
/* oklch */ color: oklch(72.8% 0.098 213.3);

Tailwind

colors: {
  custom: {
    50: '#8eccdb',
    500: '#51b7cc',
    950: '#000000',
  },
}

SCSS

$custom: #51b7cc;
$custom-light: #8eccdb;
$custom-dark: #000000;

JSON

{
  "hex": "#51b7cc",
  "rgb": {
    "r": 81,
    "g": 183,
    "b": 204
  },
  "hsl": {
    "h": 190.244,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.7275,
    "c": 0.09841,
    "h": 213.3
  },
  "luminance": 0.39976
}

Semantic roles & 50–950 ramp

primary

#51B7CC

secondary

#D6ACA3

accent

#634ADE

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #51B7CC

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

Preview Lab → · Contrast checker → · Palette generator →