#5B91EF#5B91EF

#5B91EF is a light, vivid blue. Relative luminance 0.287; OKLCH L 66.3% C 0.152 H 260.8°. Best body text is #000000 at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#5B91EF
RGB	rgb(91, 145, 239)
HSL	hsl(218, 82%, 65%)
HSV	hsv(218, 62%, 94%)
CMYK	cmyk(61.9%, 39.3%, 0%, 6.3%)
CIE-LAB	lab(60.52, 10.66, -52.66)
CIE-LCH	lch(60.52, 53.73, 281.44°)
OKLab	oklab(66.29% -0.0244 -0.1498)
OKLCH	oklch(66.29% 0.152 260.8)
XYZ	xyz(30.0143, 28.7042, 85.6034)
Luminance	0.2871 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B91EF #EFB95B

analogous

#5BDBEF #5B91EF #6F5BEF

triadic

#5B91EF #EF5B91 #91EF5B

tetradic

#5B91EF #EF5BDB #EFB95B #5BEF6F

square

#5B91EF #EF5BDB #EFB95B #5BEF6F

split-complementary

#5B91EF #EF6F5B #DBEF5B

monochromatic

#1251BD #236CEA #5B91EF #93B6F4 #CBDCFA

Accessibility & contrast

On white

3.12

#5B91EF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.74

#5B91EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B91EF

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B91EF	#FFFFFF	#000000	##000000
##5B91EF	1.00	3.12	6.74	6.74
#FFFFFF	3.12	1.00	21.00	21.00
#000000	6.74	21.00	1.00	1.00
##000000	6.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6899F3

Deuteranopia (green-blind)

#528CED

Tritanopia (blue-blind)

#00A6B4

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #5b91ef;
/* rgb */ color: rgb(91, 145, 239);
/* oklch */ color: oklch(66.3% 0.152 260.8);

Tailwind

colors: {
  custom: {
    50: '#96b0f5',
    500: '#5b91ef',
    950: '#000000',
  },
}

SCSS

$custom: #5b91ef;
$custom-light: #96b0f5;
$custom-dark: #000000;

JSON

{
  "hex": "#5b91ef",
  "rgb": {
    "r": 91,
    "g": 145,
    "b": 239
  },
  "hsl": {
    "h": 218.108,
    "s": 82.222,
    "l": 64.706
  },
  "oklch": {
    "l": 0.66291,
    "c": 0.15174,
    "h": 260.8
  },
  "luminance": 0.28707
}

Semantic roles & 50–950 ramp

primary

#5B91EF

secondary

#ECDABA

accent

#9007DF

background

#F9FAFF

surface

#F2F4FE

border

#CCCED6

text

#0E1017

muted

#7E7F85

Preview Lab

Preview with #5B91EF

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

Preview Lab → · Contrast checker → · Palette generator →