#51A8CD#51A8CD

#51A8CD is a light, moderate cyan. Relative luminance 0.342; OKLCH L 69.3% C 0.099 H 228.6°. Best body text is #000000 at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#51A8CD
RGB	rgb(81, 168, 205)
HSL	hsl(198, 55%, 56%)
HSV	hsv(198, 60%, 80%)
CMYK	cmyk(60.5%, 18%, 0%, 19.6%)
CIE-LAB	lab(65.09, -15.21, -26.71)
CIE-LCH	lch(65.09, 30.74, 240.34°)
OKLab	oklab(69.27% -0.0658 -0.0745)
OKLCH	oklch(69.27% 0.099 228.6)
XYZ	xyz(28.4111, 34.1596, 62.8420)
Luminance	0.3416 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8CD #CD7651

analogous

#51CDB4 #51A8CD #516ACD

triadic

#51A8CD #CD51A8 #A8CD51

tetradic

#51A8CD #B451CD #CD7651 #6ACD51

square

#51A8CD #B451CD #CD7651 #6ACD51

split-complementary

#51A8CD #CD516A #CDB451

monochromatic

#25647F #3289AF #51A8CD #81C0DB #B0D8E8

Accessibility & contrast

On white

2.68

#51A8CD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.83

#51A8CD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8CD

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8CD	#FFFFFF	#000000	##000000
##51A8CD	1.00	2.68	7.83	7.83
#FFFFFF	2.68	1.00	21.00	21.00
#000000	7.83	21.00	1.00	1.00
##000000	7.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A5CF

Deuteranopia (green-blind)

#8398CD

Tritanopia (blue-blind)

#00B3B4

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a8cd;
/* rgb */ color: rgb(81, 168, 205);
/* oklch */ color: oklch(69.3% 0.099 228.6);

Tailwind

colors: {
  custom: {
    50: '#8dc1dc',
    500: '#51a8cd',
    950: '#000000',
  },
}

SCSS

$custom: #51a8cd;
$custom-light: #8dc1dc;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8cd",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 205
  },
  "hsl": {
    "h": 197.903,
    "s": 55.357,
    "l": 56.078
  },
  "oklch": {
    "l": 0.69272,
    "c": 0.09941,
    "h": 228.6
  },
  "luminance": 0.34162
}

Semantic roles & 50–950 ramp

primary

#51A8CD

secondary

#D7B3A3

accent

#7649DF

background

#F9FBFD

surface

#F1F7FB

border

#CBD0D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A8CD

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

Preview Lab → · Contrast checker → · Palette generator →