#5B81EB#5B81EB

#5B81EB is a light, vivid blue. Relative luminance 0.239; OKLCH L 62.7% C 0.165 H 266.8°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#5B81EB
RGB	rgb(91, 129, 235)
HSL	hsl(224, 78%, 64%)
HSV	hsv(224, 61%, 92%)
CMYK	cmyk(61.3%, 45.1%, 0%, 7.8%)
CIE-LAB	lab(56.01, 18.93, -57.64)
CIE-LCH	lch(56.01, 60.67, 288.18°)
OKLab	oklab(62.75% -0.0092 -0.1646)
OKLCH	oklch(62.75% 0.165 266.8)
XYZ	xyz(27.1549, 23.9205, 81.7672)
Luminance	0.2392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B81EB #EBC55B

analogous

#5BC9EB #5B81EB #7D5BEB

triadic

#5B81EB #EB5B81 #81EB5B

tetradic

#5B81EB #EB5BC9 #EBC55B #5BEB7D

square

#5B81EB #EB5BC9 #EBC55B #5BEB7D

split-complementary

#5B81EB #EB7D5B #C9EB5B

monochromatic

#1640B5 #2457E4 #5B81EB #92ABF2 #C8D5F8

Accessibility & contrast

On white

3.63

#5B81EB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#5B81EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B81EB

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B81EB	#FFFFFF	#000000	##000000
##5B81EB	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E8DEF

Deuteranopia (green-blind)

#3780E9

Tritanopia (blue-blind)

#0099AB

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #5b81eb;
/* rgb */ color: rgb(91, 129, 235);
/* oklch */ color: oklch(62.7% 0.165 266.8);

Tailwind

colors: {
  custom: {
    50: '#96a5f2',
    500: '#5b81eb',
    950: '#000000',
  },
}

SCSS

$custom: #5b81eb;
$custom-light: #96a5f2;
$custom-dark: #000000;

JSON

{
  "hex": "#5b81eb",
  "rgb": {
    "r": 91,
    "g": 129,
    "b": 235
  },
  "hsl": {
    "h": 224.167,
    "s": 78.261,
    "l": 63.922
  },
  "oklch": {
    "l": 0.62745,
    "c": 0.16483,
    "h": 266.8
  },
  "luminance": 0.23923
}

Semantic roles & 50–950 ramp

primary

#5B81EB

secondary

#EADDB8

accent

#A40BDB

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F17

muted

#7E7F85

Preview Lab

Preview with #5B81EB

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

Preview Lab → · Contrast checker → · Palette generator →