#5181E8#5181E8

#5181E8 is a light, vivid blue. Relative luminance 0.233; OKLCH L 62.1% C 0.164 H 263.5°. Best body text is #000000 at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#5181E8
RGB	rgb(81, 129, 232)
HSL	hsl(221, 77%, 61%)
HSV	hsv(221, 65%, 91%)
CMYK	cmyk(65.1%, 44.4%, 0%, 9%)
CIE-LAB	lab(55.35, 16.20, -57.04)
CIE-LCH	lch(55.35, 59.30, 285.86°)
OKLab	oklab(62.06% -0.0184 -0.163)
OKLCH	oklch(62.06% 0.164 263.5)
XYZ	xyz(25.8040, 23.2736, 79.4607)
Luminance	0.2328 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181E8 #E8B851

analogous

#51CDE8 #5181E8 #6D51E8

triadic

#5181E8 #E85181 #81E851

tetradic

#5181E8 #E851CD #E8B851 #51E86D

square

#5181E8 #E851CD #E8B851 #51E86D

split-complementary

#5181E8 #E86D51 #CDE851

monochromatic

#1645A8 #1D5BDE #5181E8 #87A8EF #BDCFF6

Accessibility & contrast

On white

3.71

#5181E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.66

#5181E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181E8

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181E8	#FFFFFF	#000000	##000000
##5181E8	1.00	3.71	5.66	5.66
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.66	21.00	1.00	1.00
##000000	5.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F8CEC

Deuteranopia (green-blind)

#357EE6

Tritanopia (blue-blind)

#0099A9

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #5181e8;
/* rgb */ color: rgb(81, 129, 232);
/* oklch */ color: oklch(62.1% 0.164 263.5);

Tailwind

colors: {
  custom: {
    50: '#90a5f0',
    500: '#5181e8',
    950: '#000000',
  },
}

SCSS

$custom: #5181e8;
$custom-light: #90a5f0;
$custom-dark: #000000;

JSON

{
  "hex": "#5181e8",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 232
  },
  "hsl": {
    "h": 220.927,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.62056,
    "c": 0.16406,
    "h": 263.5
  },
  "luminance": 0.23276
}

Semantic roles & 50–950 ramp

primary

#5181E8

secondary

#E7D5AE

accent

#980DD9

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #5181E8

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

Preview Lab → · Contrast checker → · Palette generator →