#5B91EB#5B91EB

#5B91EB is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.1% C 0.146 H 260.1°. Best body text is #000000 at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#5B91EB
RGB	rgb(91, 145, 235)
HSL	hsl(218, 78%, 64%)
HSV	hsv(218, 61%, 92%)
CMYK	cmyk(61.3%, 38.3%, 0%, 7.8%)
CIE-LAB	lab(60.31, 9.33, -50.78)
CIE-LCH	lch(60.31, 51.63, 280.42°)
OKLab	oklab(66.06% -0.0252 -0.1443)
OKLCH	oklch(66.06% 0.146 260.1)
XYZ	xyz(29.4299, 28.4704, 82.5256)
Luminance	0.2847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B91EB #EBB55B

analogous

#5BD9EB #5B91EB #6D5BEB

triadic

#5B91EB #EB5B91 #91EB5B

tetradic

#5B91EB #EB5BD9 #EBB55B #5BEB6D

square

#5B91EB #EB5BD9 #EBB55B #5BEB6D

split-complementary

#5B91EB #EB6D5B #D9EB5B

monochromatic

#1652B5 #246CE4 #5B91EB #92B6F2 #C8DAF8

Accessibility & contrast

On white

3.14

#5B91EB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.69

#5B91EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B91EB

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B91EB	#FFFFFF	#000000	##000000
##5B91EB	1.00	3.14	6.69	6.69
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.69	21.00	1.00	1.00
##000000	6.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A99EF

Deuteranopia (green-blind)

#568BE9

Tritanopia (blue-blind)

#00A5B3

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #5b91eb;
/* rgb */ color: rgb(91, 145, 235);
/* oklch */ color: oklch(66.1% 0.146 260.1);

Tailwind

colors: {
  custom: {
    50: '#95b0f2',
    500: '#5b91eb',
    950: '#000000',
  },
}

SCSS

$custom: #5b91eb;
$custom-light: #95b0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#5b91eb",
  "rgb": {
    "r": 91,
    "g": 145,
    "b": 235
  },
  "hsl": {
    "h": 217.5,
    "s": 78.261,
    "l": 63.922
  },
  "oklch": {
    "l": 0.66061,
    "c": 0.14646,
    "h": 260.1
  },
  "luminance": 0.28473
}

Semantic roles & 50–950 ramp

primary

#5B91EB

secondary

#EAD7B8

accent

#8D0BDB

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E1017

muted

#7E7F85

Preview Lab

Preview with #5B91EB

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

Preview Lab → · Contrast checker → · Palette generator →