#51A8DF#51A8DF

#51A8DF is a light, moderate cyan. Relative luminance 0.351; OKLCH L 70.1% C 0.116 H 239.2°. Best body text is #000000 at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#51A8DF
RGB	rgb(81, 168, 223)
HSL	hsl(203, 69%, 60%)
HSV	hsv(203, 64%, 87%)
CMYK	cmyk(63.7%, 24.7%, 0%, 12.5%)
CIE-LAB	lab(65.81, -9.53, -35.54)
CIE-LCH	lch(65.81, 36.79, 254.98°)
OKLab	oklab(70.08% -0.0595 -0.0998)
OKLCH	oklch(70.08% 0.116 239.2)
XYZ	xyz(30.7102, 35.0792, 74.9502)
Luminance	0.3508 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8DF #DF8851

analogous

#51DFCF #51A8DF #5161DF

triadic

#51A8DF #DF51A8 #A8DF51

tetradic

#51A8DF #CF51DF #DF8851 #61DF51

square

#51A8DF #CF51DF #DF8851 #61DF51

split-complementary

#51A8DF #DF5161 #DFCF51

monochromatic

#1C6999 #268CCD #51A8DF #85C2E9 #B8DCF2

Accessibility & contrast

On white

2.62

#51A8DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.02

#51A8DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8DF

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8DF	#FFFFFF	#000000	##000000
##51A8DF	1.00	2.62	8.02	8.02
#FFFFFF	2.62	1.00	21.00	21.00
#000000	8.02	21.00	1.00	1.00
##000000	8.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FA8E2

Deuteranopia (green-blind)

#7B9ADE

Tritanopia (blue-blind)

#00B6BB

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #51a8df;
/* rgb */ color: rgb(81, 168, 223);
/* oklch */ color: oklch(70.1% 0.116 239.2);

Tailwind

colors: {
  custom: {
    50: '#8fc1e9',
    500: '#51a8df',
    950: '#000000',
  },
}

SCSS

$custom: #51a8df;
$custom-light: #8fc1e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8df",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 223
  },
  "hsl": {
    "h": 203.239,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.70084,
    "c": 0.11626,
    "h": 239.2
  },
  "luminance": 0.35082
}

Semantic roles & 50–950 ramp

primary

#51A8DF

secondary

#E1C0AA

accent

#803CEC

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A8DF

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

Preview Lab → · Contrast checker → · Palette generator →