#5B91E9#5B91E9

#5B91E9 is a light, vivid blue. Relative luminance 0.284; OKLCH L 65.9% C 0.144 H 259.7°. Best body text is #000000 at 6.67:1 contrast (WCAG AA passes).

Color values

HEX	#5B91E9
RGB	rgb(91, 145, 233)
HSL	hsl(217, 76%, 64%)
HSV	hsv(217, 61%, 91%)
CMYK	cmyk(60.9%, 37.8%, 0%, 8.6%)
CIE-LAB	lab(60.21, 8.67, -49.83)
CIE-LCH	lch(60.21, 50.58, 279.87°)
OKLab	oklab(65.95% -0.0257 -0.1415)
OKLCH	oklch(65.95% 0.144 259.7)
XYZ	xyz(29.1426, 28.3555, 81.0124)
Luminance	0.2836 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B91E9 #E9B35B

analogous

#5BD8E9 #5B91E9 #6C5BE9

triadic

#5B91E9 #E95B91 #91E95B

tetradic

#5B91E9 #E95BD8 #E9B35B #5BE96C

square

#5B91E9 #E95BD8 #E9B35B #5BE96C

split-complementary

#5B91E9 #E96C5B #D8E95B

monochromatic

#1852B2 #256DE2 #5B91E9 #91B5F0 #C7D9F7

Accessibility & contrast

On white

3.15

#5B91E9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.67

#5B91E9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B91E9

6.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B91E9	#FFFFFF	#000000	##000000
##5B91E9	1.00	3.15	6.67	6.67
#FFFFFF	3.15	1.00	21.00	21.00
#000000	6.67	21.00	1.00	1.00
##000000	6.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B98ED

Deuteranopia (green-blind)

#578BE7

Tritanopia (blue-blind)

#00A5B2

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #5b91e9;
/* rgb */ color: rgb(91, 145, 233);
/* oklch */ color: oklch(65.9% 0.144 259.7);

Tailwind

colors: {
  custom: {
    50: '#95b0f0',
    500: '#5b91e9',
    950: '#000000',
  },
}

SCSS

$custom: #5b91e9;
$custom-light: #95b0f0;
$custom-dark: #000000;

JSON

{
  "hex": "#5b91e9",
  "rgb": {
    "r": 91,
    "g": 145,
    "b": 233
  },
  "hsl": {
    "h": 217.183,
    "s": 76.344,
    "l": 63.529
  },
  "oklch": {
    "l": 0.65948,
    "c": 0.14381,
    "h": 259.7
  },
  "luminance": 0.28358
}

Semantic roles & 50–950 ramp

primary

#5B91E9

secondary

#E9D6B7

accent

#8B0DD9

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E1016

muted

#7E7F84

Preview Lab

Preview with #5B91E9

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

Preview Lab → · Contrast checker → · Palette generator →