#51A5CF#51A5CF

#51A5CF is a light, moderate cyan. Relative luminance 0.332; OKLCH L 68.7% C 0.102 H 232.7°. Best body text is #000000 at 7.63:1 contrast (WCAG AA passes).

Color values

HEX	#51A5CF
RGB	rgb(81, 165, 207)
HSL	hsl(200, 57%, 56%)
HSV	hsv(200, 61%, 81%)
CMYK	cmyk(60.9%, 20.3%, 0%, 18.8%)
CIE-LAB	lab(64.29, -12.97, -29.05)
CIE-LCH	lch(64.29, 31.81, 245.94°)
OKLab	oklab(68.66% -0.0618 -0.0812)
OKLCH	oklch(68.66% 0.102 232.7)
XYZ	xyz(28.1066, 33.1618, 63.9390)
Luminance	0.3317 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A5CF #CF7B51

analogous

#51CFBA #51A5CF #5166CF

triadic

#51A5CF #CF51A5 #A5CF51

tetradic

#51A5CF #BA51CF #CF7B51 #66CF51

square

#51A5CF #BA51CF #CF7B51 #66CF51

split-complementary

#51A5CF #CF5166 #CFBA51

monochromatic

#246282 #3187B2 #51A5CF #81BEDC #B1D7E9

Accessibility & contrast

On white

2.75

#51A5CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.63

#51A5CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A5CF

7.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A5CF	#FFFFFF	#000000	##000000
##51A5CF	1.00	2.75	7.63	7.63
#FFFFFF	2.75	1.00	21.00	21.00
#000000	7.63	21.00	1.00	1.00
##000000	7.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A3D1

Deuteranopia (green-blind)

#7F96CE

Tritanopia (blue-blind)

#00B0B3

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #51a5cf;
/* rgb */ color: rgb(81, 165, 207);
/* oklch */ color: oklch(68.7% 0.102 232.7);

Tailwind

colors: {
  custom: {
    50: '#8dbfdd',
    500: '#51a5cf',
    950: '#000000',
  },
}

SCSS

$custom: #51a5cf;
$custom-light: #8dbfdd;
$custom-dark: #000000;

JSON

{
  "hex": "#51a5cf",
  "rgb": {
    "r": 81,
    "g": 165,
    "b": 207
  },
  "hsl": {
    "h": 200,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.68663,
    "c": 0.10208,
    "h": 232.7
  },
  "luminance": 0.33165
}

Semantic roles & 50–950 ramp

primary

#51A5CF

secondary

#D8B5A4

accent

#7B48E0

background

#F9FBFD

surface

#F1F7FB

border

#CBD0D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #51A5CF

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

Preview Lab → · Contrast checker → · Palette generator →