#5B81F8#5B81F8

#5B81F8 is a light, vivid blue. Relative luminance 0.247; OKLCH L 63.6% C 0.182 H 267.7°. Best body text is #000000 at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#5B81F8
RGB	rgb(91, 129, 248)
HSL	hsl(225, 92%, 66%)
HSV	hsv(225, 63%, 97%)
CMYK	cmyk(63.3%, 48%, 0%, 2.7%)
CIE-LAB	lab(56.78, 23.29, -63.61)
CIE-LCH	lch(56.78, 67.74, 290.11°)
OKLab	oklab(63.58% -0.0074 -0.1821)
OKLCH	oklch(63.58% 0.182 267.7)
XYZ	xyz(29.1021, 24.6993, 92.0225)
Luminance	0.2470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B81F8 #F8D25B

analogous

#5BCFF8 #5B81F8 #845BF8

triadic

#5B81F8 #F85B81 #81F85B

tetradic

#5B81F8 #F85BCF #F8D25B #5BF884

square

#5B81F8 #F85BCF #F8D25B #5BF884

split-complementary

#5B81F8 #F8845B #CFF85B

monochromatic

#0939D0 #2054F5 #5B81F8 #96AEFB #D0DBFD

Accessibility & contrast

On white

3.54

#5B81F8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.94

#5B81F8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B81F8

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B81F8	#FFFFFF	#000000	##000000
##5B81F8	1.00	3.54	5.94	5.94
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.94	21.00	1.00	1.00
##000000	5.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4290FC

Deuteranopia (green-blind)

#1F82F6

Tritanopia (blue-blind)

#009CB1

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #5b81f8;
/* rgb */ color: rgb(91, 129, 248);
/* oklch */ color: oklch(63.6% 0.182 267.7);

Tailwind

colors: {
  custom: {
    50: '#98a5fb',
    500: '#5b81f8',
    950: '#000000',
  },
}

SCSS

$custom: #5b81f8;
$custom-light: #98a5fb;
$custom-dark: #000000;

JSON

{
  "hex": "#5b81f8",
  "rgb": {
    "r": 91,
    "g": 129,
    "b": 248
  },
  "hsl": {
    "h": 225.478,
    "s": 91.813,
    "l": 66.471
  },
  "oklch": {
    "l": 0.63584,
    "c": 0.18229,
    "h": 267.7
  },
  "luminance": 0.24702
}

Semantic roles & 50–950 ramp

primary

#5B81F8

secondary

#F1E5BE

accent

#AE00E6

background

#FAFAFF

surface

#F3F4FF

border

#CDCED7

text

#0F0F17

muted

#7F7F85

Preview Lab

Preview with #5B81F8

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

Preview Lab → · Contrast checker → · Palette generator →