#21539A#21539A

#21539A is a dark, vivid blue. Relative luminance 0.088; OKLCH L 44.8% C 0.128 H 257.8°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#21539A
RGB	rgb(33, 83, 154)
HSL	hsl(215, 65%, 37%)
HSV	hsv(215, 79%, 60%)
CMYK	cmyk(78.6%, 46.1%, 0%, 39.6%)
CIE-LAB	lab(35.68, 9.71, -43.55)
CIE-LCH	lch(35.68, 44.62, 282.56°)
OKLab	oklab(44.84% -0.0269 -0.1249)
OKLCH	oklch(44.84% 0.128 257.8)
XYZ	xyz(9.5510, 8.8418, 31.7689)
Luminance	0.0884 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21539A #9A6821

analogous

#21909A #21539A #2C219A

triadic

#21539A #9A2153 #539A21

tetradic

#21539A #9A2190 #9A6821 #219A2C

square

#21539A #9A2190 #9A6821 #219A2C

split-complementary

#21539A #9A2C21 #909A21

monochromatic

#0B1D35 #163868 #21539A #2C6ECC #5A8FDC

Accessibility & contrast

On white

7.59

#21539A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#21539A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21539A

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21539A	#FFFFFF	#000000	##FFFFFF
##21539A	1.00	7.59	2.77	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5A9D

Deuteranopia (green-blind)

#134F99

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #21539a;
/* rgb */ color: rgb(33, 83, 154);
/* oklch */ color: oklch(44.8% 0.128 257.8);

Tailwind

colors: {
  custom: {
    50: '#6f82b8',
    500: '#21539a',
    950: '#000000',
  },
}

SCSS

$custom: #21539a;
$custom-light: #6f82b8;
$custom-dark: #000000;

JSON

{
  "hex": "#21539a",
  "rgb": {
    "r": 33,
    "g": 83,
    "b": 154
  },
  "hsl": {
    "h": 215.207,
    "s": 64.706,
    "l": 36.667
  },
  "oklch": {
    "l": 0.44835,
    "c": 0.12776,
    "h": 257.8
  },
  "luminance": 0.08843
}

Semantic roles & 50–950 ramp

primary

#21539A

secondary

#C09457

accent

#A240E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #21539A

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

Preview Lab → · Contrast checker → · Palette generator →