#21539C#21539C

#21539C is a dark, vivid blue. Relative luminance 0.089; OKLCH L 45.0% C 0.131 H 258.3°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#21539C
RGB	rgb(33, 83, 156)
HSL	hsl(216, 65%, 37%)
HSV	hsv(216, 79%, 61%)
CMYK	cmyk(78.8%, 46.8%, 0%, 38.8%)
CIE-LAB	lab(35.81, 10.50, -44.55)
CIE-LCH	lch(35.81, 45.77, 283.26°)
OKLab	oklab(44.98% -0.0266 -0.1278)
OKLCH	oklch(44.98% 0.131 258.3)
XYZ	xyz(9.7190, 8.9090, 32.6534)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21539C #9C6A21

analogous

#21909C #21539C #2D219C

triadic

#21539C #9C2153 #539C21

tetradic

#21539C #9C2190 #9C6A21 #219C2D

square

#21539C #9C2190 #9C6A21 #219C2D

split-complementary

#21539C #9C2D21 #909C21

monochromatic

#0C1D37 #163869 #21539C #2C6ECF #5B90DC

Accessibility & contrast

On white

7.55

#21539C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#21539C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21539C

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21539C	#FFFFFF	#000000	##FFFFFF
##21539C	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5A9F

Deuteranopia (green-blind)

#0E4F9B

Tritanopia (blue-blind)

#006470

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #21539c;
/* rgb */ color: rgb(33, 83, 156);
/* oklch */ color: oklch(45.0% 0.131 258.3);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#21539c",
  "rgb": {
    "r": 33,
    "g": 83,
    "b": 156
  },
  "hsl": {
    "h": 215.61,
    "s": 65.079,
    "l": 37.059
  },
  "oklch": {
    "l": 0.44978,
    "c": 0.13055,
    "h": 258.3
  },
  "luminance": 0.0891
}

Semantic roles & 50–950 ramp

primary

#21539C

secondary

#C19658

accent

#A440E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #21539C

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

Preview Lab → · Contrast checker → · Palette generator →