#51A9DF#51A9DF

#51A9DF is a light, moderate cyan. Relative luminance 0.355; OKLCH L 70.3% C 0.116 H 238.4°. Best body text is #000000 at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#51A9DF
RGB	rgb(81, 169, 223)
HSL	hsl(203, 69%, 60%)
HSV	hsv(203, 64%, 87%)
CMYK	cmyk(63.7%, 24.2%, 0%, 12.5%)
CIE-LAB	lab(66.10, -10.08, -35.09)
CIE-LCH	lch(66.10, 36.51, 253.97°)
OKLab	oklab(70.31% -0.0606 -0.0986)
OKLCH	oklch(70.31% 0.116 238.4)
XYZ	xyz(30.8955, 35.4498, 75.0120)
Luminance	0.3545 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A9DF #DF8751

analogous

#51DFCE #51A9DF #5162DF

triadic

#51A9DF #DF51A9 #A9DF51

tetradic

#51A9DF #CE51DF #DF8751 #62DF51

square

#51A9DF #CE51DF #DF8751 #62DF51

split-complementary

#51A9DF #DF5162 #DFCE51

monochromatic

#1C6A99 #268DCD #51A9DF #85C3E9 #B8DCF2

Accessibility & contrast

On white

2.60

#51A9DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.09

#51A9DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A9DF

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A9DF	#FFFFFF	#000000	##000000
##51A9DF	1.00	2.60	8.09	8.09
#FFFFFF	2.60	1.00	21.00	21.00
#000000	8.09	21.00	1.00	1.00
##000000	8.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90A9E2

Deuteranopia (green-blind)

#7D9ADE

Tritanopia (blue-blind)

#00B7BB

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #51a9df;
/* rgb */ color: rgb(81, 169, 223);
/* oklch */ color: oklch(70.3% 0.116 238.4);

Tailwind

colors: {
  custom: {
    50: '#8fc2e9',
    500: '#51a9df',
    950: '#000000',
  },
}

SCSS

$custom: #51a9df;
$custom-light: #8fc2e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51a9df",
  "rgb": {
    "r": 81,
    "g": 169,
    "b": 223
  },
  "hsl": {
    "h": 202.817,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.70311,
    "c": 0.11569,
    "h": 238.4
  },
  "luminance": 0.35453
}

Semantic roles & 50–950 ramp

primary

#51A9DF

secondary

#E1BFAA

accent

#7F3CEC

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A9DF

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

Preview Lab → · Contrast checker → · Palette generator →