#51B0EA#51B0EA

#51B0EA is a light, vivid cyan. Relative luminance 0.387; OKLCH L 72.4% C 0.123 H 238.6°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#51B0EA
RGB	rgb(81, 176, 234)
HSL	hsl(203, 78%, 62%)
HSV	hsv(203, 65%, 92%)
CMYK	cmyk(65.4%, 24.8%, 0%, 8.2%)
CIE-LAB	lab(68.56, -10.37, -37.29)
CIE-LCH	lch(68.56, 38.70, 254.46°)
OKLab	oklab(72.42% -0.0641 -0.1048)
OKLCH	oklch(72.42% 0.123 238.6)
XYZ	xyz(33.7642, 38.7370, 83.5235)
Luminance	0.3874 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B0EA #EA8B51

analogous

#51EAD8 #51B0EA #5164EA

triadic

#51B0EA #EA51B0 #B0EA51

tetradic

#51B0EA #D851EA #EA8B51 #64EA51

square

#51B0EA #D851EA #EA8B51 #64EA51

split-complementary

#51B0EA #EA5164 #EAD851

monochromatic

#1573AC #1B97E2 #51B0EA #88C9F1 #BEE2F7

Accessibility & contrast

On white

2.40

#51B0EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#51B0EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B0EA

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B0EA	#FFFFFF	#000000	##000000
##51B0EA	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B0ED

Deuteranopia (green-blind)

#80A1E9

Tritanopia (blue-blind)

#00BFC4

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b0ea;
/* rgb */ color: rgb(81, 176, 234);
/* oklch */ color: oklch(72.4% 0.123 238.6);

Tailwind

colors: {
  custom: {
    50: '#91c7f1',
    500: '#51b0ea',
    950: '#000000',
  },
}

SCSS

$custom: #51b0ea;
$custom-light: #91c7f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51b0ea",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 234
  },
  "hsl": {
    "h": 202.745,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.72416,
    "c": 0.12289,
    "h": 238.6
  },
  "luminance": 0.38741
}

Semantic roles & 50–950 ramp

primary

#51B0EA

secondary

#E8C5AF

accent

#5A0BDB

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B0EA

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

Preview Lab → · Contrast checker → · Palette generator →