#21539D#21539D

#21539D is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.1% C 0.132 H 258.5°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#21539D
RGB	rgb(33, 83, 157)
HSL	hsl(216, 65%, 37%)
HSV	hsv(216, 79%, 62%)
CMYK	cmyk(79%, 47.1%, 0%, 38.4%)
CIE-LAB	lab(35.87, 10.89, -45.04)
CIE-LCH	lch(35.87, 46.34, 283.60°)
OKLab	oklab(45.05% -0.0264 -0.1293)
OKLCH	oklch(45.05% 0.132 258.5)
XYZ	xyz(9.8040, 8.9430, 33.1012)
Luminance	0.0894 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21539D #9D6B21

analogous

#21919D #21539D #2D219D

triadic

#21539D #9D2153 #539D21

tetradic

#21539D #9D2191 #9D6B21 #219D2D

square

#21539D #9D2191 #9D6B21 #219D2D

split-complementary

#21539D #9D2D21 #919D21

monochromatic

#0C1E38 #16386A #21539D #2C6ED0 #5C90DD

Accessibility & contrast

On white

7.53

#21539D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#21539D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21539D

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21539D	#FFFFFF	#000000	##FFFFFF
##21539D	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B5AA0

Deuteranopia (green-blind)

#0A4F9C

Tritanopia (blue-blind)

#006570

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #21539d;
/* rgb */ color: rgb(33, 83, 157);
/* oklch */ color: oklch(45.1% 0.132 258.5);

Tailwind

colors: {
  custom: {
    50: '#7082ba',
    500: '#21539d',
    950: '#000000',
  },
}

SCSS

$custom: #21539d;
$custom-light: #7082ba;
$custom-dark: #000000;

JSON

{
  "hex": "#21539d",
  "rgb": {
    "r": 33,
    "g": 83,
    "b": 157
  },
  "hsl": {
    "h": 215.806,
    "s": 65.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.4505,
    "c": 0.13194,
    "h": 258.5
  },
  "luminance": 0.08944
}

Semantic roles & 50–950 ramp

primary

#21539D

secondary

#C19759

accent

#A440E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #21539D

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

Preview Lab → · Contrast checker → · Palette generator →