#51A8DA#51A8DA

#51A8DA is a light, moderate cyan. Relative luminance 0.348; OKLCH L 69.9% C 0.111 H 236.6°. Best body text is #000000 at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#51A8DA
RGB	rgb(81, 168, 218)
HSL	hsl(202, 65%, 59%)
HSV	hsv(202, 63%, 85%)
CMYK	cmyk(62.8%, 22.9%, 0%, 14.5%)
CIE-LAB	lab(65.60, -11.13, -33.10)
CIE-LCH	lch(65.60, 34.93, 251.41°)
OKLab	oklab(69.85% -0.0612 -0.0928)
OKLCH	oklch(69.85% 0.111 236.6)
XYZ	xyz(30.0460, 34.8135, 71.4523)
Luminance	0.3482 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8DA #DA8351

analogous

#51DAC7 #51A8DA #5163DA

triadic

#51A8DA #DA51A8 #A8DA51

tetradic

#51A8DA #C751DA #DA8351 #63DA51

square

#51A8DA #C751DA #DA8351 #63DA51

split-complementary

#51A8DA #DA5163 #DAC751

monochromatic

#1F6892 #2A8CC4 #51A8DA #83C1E5 #B6DAEF

Accessibility & contrast

On white

2.64

#51A8DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.96

#51A8DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8DA

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8DA	#FFFFFF	#000000	##000000
##51A8DA	1.00	2.64	7.96	7.96
#FFFFFF	2.64	1.00	21.00	21.00
#000000	7.96	21.00	1.00	1.00
##000000	7.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91A7DC

Deuteranopia (green-blind)

#7E99D9

Tritanopia (blue-blind)

#00B5B9

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a8da;
/* rgb */ color: rgb(81, 168, 218);
/* oklch */ color: oklch(69.9% 0.111 236.6);

Tailwind

colors: {
  custom: {
    50: '#8ec1e5',
    500: '#51a8da',
    950: '#000000',
  },
}

SCSS

$custom: #51a8da;
$custom-light: #8ec1e5;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8da",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 218
  },
  "hsl": {
    "h": 201.898,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.69851,
    "c": 0.1112,
    "h": 236.6
  },
  "luminance": 0.34817
}

Semantic roles & 50–950 ramp

primary

#51A8DA

secondary

#DEBCA8

accent

#7D40E8

background

#F9FBFE

surface

#F2F7FC

border

#CCD0D5

text

#0D1215

muted

#7E8184

Preview Lab

Preview with #51A8DA

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

Preview Lab → · Contrast checker → · Palette generator →