#5B81EF#5B81EF

#5B81EF is a light, vivid blue. Relative luminance 0.242; OKLCH L 63.0% C 0.170 H 267.1°. Best body text is #000000 at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#5B81EF
RGB	rgb(91, 129, 239)
HSL	hsl(225, 82%, 65%)
HSV	hsv(225, 62%, 94%)
CMYK	cmyk(61.9%, 46%, 0%, 6.3%)
CIE-LAB	lab(56.24, 20.27, -59.49)
CIE-LCH	lch(56.24, 62.85, 288.82°)
OKLab	oklab(63% -0.0086 -0.17)
OKLCH	oklch(63% 0.17 267.1)
XYZ	xyz(27.7393, 24.1542, 84.8450)
Luminance	0.2416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B81EF #EFC95B

analogous

#5BCBEF #5B81EF #7F5BEF

triadic

#5B81EF #EF5B81 #81EF5B

tetradic

#5B81EF #EF5BCB #EFC95B #5BEF7F

square

#5B81EF #EF5BCB #EFC95B #5BEF7F

split-complementary

#5B81EF #EF7F5B #CBEF5B

monochromatic

#123EBD #2356EA #5B81EF #93ACF4 #CBD7FA

Accessibility & contrast

On white

3.60

#5B81EF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.83

#5B81EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B81EF

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B81EF	#FFFFFF	#000000	##000000
##5B81EF	1.00	3.60	5.83	5.83
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.83	21.00	1.00	1.00
##000000	5.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B8EF3

Deuteranopia (green-blind)

#3181ED

Tritanopia (blue-blind)

#009AAC

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #5b81ef;
/* rgb */ color: rgb(91, 129, 239);
/* oklch */ color: oklch(63.0% 0.170 267.1);

Tailwind

colors: {
  custom: {
    50: '#96a5f5',
    500: '#5b81ef',
    950: '#000000',
  },
}

SCSS

$custom: #5b81ef;
$custom-light: #96a5f5;
$custom-dark: #000000;

JSON

{
  "hex": "#5b81ef",
  "rgb": {
    "r": 91,
    "g": 129,
    "b": 239
  },
  "hsl": {
    "h": 224.595,
    "s": 82.222,
    "l": 64.706
  },
  "oklch": {
    "l": 0.62999,
    "c": 0.17024,
    "h": 267.1
  },
  "luminance": 0.24157
}

Semantic roles & 50–950 ramp

primary

#5B81EF

secondary

#ECDFBA

accent

#A707DF

background

#F9FAFF

surface

#F2F4FE

border

#CCCED6

text

#0F0F17

muted

#7E7F85

Preview Lab

Preview with #5B81EF

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

Preview Lab → · Contrast checker → · Palette generator →