#51A8EA#51A8EA

#51A8EA is a light, vivid cyan. Relative luminance 0.357; OKLCH L 70.6% C 0.128 H 244.0°. Best body text is #000000 at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#51A8EA
RGB	rgb(81, 168, 234)
HSL	hsl(206, 78%, 62%)
HSV	hsv(206, 65%, 92%)
CMYK	cmyk(65.4%, 28.2%, 0%, 8.2%)
CIE-LAB	lab(66.28, -5.96, -40.84)
CIE-LCH	lch(66.28, 41.28, 261.69°)
OKLab	oklab(70.61% -0.0561 -0.1152)
OKLCH	oklch(70.61% 0.128 244)
XYZ	xyz(32.2416, 35.6918, 83.0160)
Luminance	0.3569 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A8EA #EA9351

analogous

#51EADF #51A8EA #515CEA

triadic

#51A8EA #EA51A8 #A8EA51

tetradic

#51A8EA #DF51EA #EA9351 #5CEA51

square

#51A8EA #DF51EA #EA9351 #5CEA51

split-complementary

#51A8EA #EA515C #EADF51

monochromatic

#156BAC #1B8DE2 #51A8EA #88C3F1 #BEDFF7

Accessibility & contrast

On white

2.58

#51A8EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.14

#51A8EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8EA

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A8EA	#FFFFFF	#000000	##000000
##51A8EA	1.00	2.58	8.14	8.14
#FFFFFF	2.58	1.00	21.00	21.00
#000000	8.14	21.00	1.00	1.00
##000000	8.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8AA9ED

Deuteranopia (green-blind)

#769AE9

Tritanopia (blue-blind)

#00B8BF

Achromatopsia (no color)

#A1A1A1

Design tokens & code

CSS

--color: #51a8ea;
/* rgb */ color: rgb(81, 168, 234);
/* oklch */ color: oklch(70.6% 0.128 244.0);

Tailwind

colors: {
  custom: {
    50: '#91c1f1',
    500: '#51a8ea',
    950: '#000000',
  },
}

SCSS

$custom: #51a8ea;
$custom-light: #91c1f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51a8ea",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 234
  },
  "hsl": {
    "h": 205.882,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.70614,
    "c": 0.12812,
    "h": 244
  },
  "luminance": 0.35695
}

Semantic roles & 50–950 ramp

primary

#51A8EA

secondary

#E8C8AF

accent

#640BDB

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A8EA

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

Preview Lab → · Contrast checker → · Palette generator →