#51A3EA#51A3EA

#51A3EA is a light, vivid cyan. Relative luminance 0.339; OKLCH L 69.5% C 0.132 H 247.2°. Best body text is #000000 at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#51A3EA
RGB	rgb(81, 163, 234)
HSL	hsl(208, 78%, 62%)
HSV	hsv(208, 65%, 92%)
CMYK	cmyk(65.4%, 30.3%, 0%, 8.2%)
CIE-LAB	lab(64.87, -3.16, -43.06)
CIE-LCH	lch(64.87, 43.18, 265.81°)
OKLab	oklab(69.5% -0.0511 -0.1217)
OKLCH	oklch(69.5% 0.132 247.2)
XYZ	xyz(31.3363, 33.8810, 82.7142)
Luminance	0.3388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3EA #EA9851

analogous

#51EAE5 #51A3EA #5157EA

triadic

#51A3EA #EA51A3 #A3EA51

tetradic

#51A3EA #E551EA #EA9851 #57EA51

square

#51A3EA #E551EA #EA9851 #57EA51

split-complementary

#51A3EA #EA5157 #EAE551

monochromatic

#1566AC #1B86E2 #51A3EA #88C0F1 #BEDDF7

Accessibility & contrast

On white

2.70

#51A3EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.78

#51A3EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3EA

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3EA	#FFFFFF	#000000	##000000
##51A3EA	1.00	2.70	7.78	7.78
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.78	21.00	1.00	1.00
##000000	7.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#84A6ED

Deuteranopia (green-blind)

#6F97E9

Tritanopia (blue-blind)

#00B4BC

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a3ea;
/* rgb */ color: rgb(81, 163, 234);
/* oklch */ color: oklch(69.5% 0.132 247.2);

Tailwind

colors: {
  custom: {
    50: '#90bef1',
    500: '#51a3ea',
    950: '#000000',
  },
}

SCSS

$custom: #51a3ea;
$custom-light: #90bef1;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3ea",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 234
  },
  "hsl": {
    "h": 207.843,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.69498,
    "c": 0.13198,
    "h": 247.2
  },
  "luminance": 0.33884
}

Semantic roles & 50–950 ramp

primary

#51A3EA

secondary

#E8C9AF

accent

#6B0BDB

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A3EA

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

Preview Lab → · Contrast checker → · Palette generator →