#21539B#21539B

#21539B is a dark, vivid blue. Relative luminance 0.089; OKLCH L 44.9% C 0.129 H 258.1°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#21539B
RGB	rgb(33, 83, 155)
HSL	hsl(215, 65%, 37%)
HSV	hsv(215, 79%, 61%)
CMYK	cmyk(78.7%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(35.74, 10.10, -44.05)
CIE-LCH	lch(35.74, 45.19, 282.92°)
OKLab	oklab(44.91% -0.0267 -0.1264)
OKLCH	oklch(44.91% 0.129 258.1)
XYZ	xyz(9.6347, 8.8753, 32.2093)
Luminance	0.0888 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21539B #9B6921

analogous

#21909B #21539B #2C219B

triadic

#21539B #9B2153 #539B21

tetradic

#21539B #9B2190 #9B6921 #219B2C

square

#21539B #9B2190 #9B6921 #219B2C

split-complementary

#21539B #9B2C21 #909B21

monochromatic

#0C1D36 #163869 #21539B #2C6ECD #5A90DC

Accessibility & contrast

On white

7.57

#21539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#21539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21539B

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21539B	#FFFFFF	#000000	##FFFFFF
##21539B	1.00	7.57	2.78	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D5A9E

Deuteranopia (green-blind)

#104F9A

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #21539b;
/* rgb */ color: rgb(33, 83, 155);
/* oklch */ color: oklch(44.9% 0.129 258.1);

Tailwind

colors: {
  custom: {
    50: '#6f82b9',
    500: '#21539b',
    950: '#000000',
  },
}

SCSS

$custom: #21539b;
$custom-light: #6f82b9;
$custom-dark: #000000;

JSON

{
  "hex": "#21539b",
  "rgb": {
    "r": 33,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 215.41,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.44906,
    "c": 0.12916,
    "h": 258.1
  },
  "luminance": 0.08876
}

Semantic roles & 50–950 ramp

primary

#21539B

secondary

#C09558

accent

#A340E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #21539B

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

Preview Lab → · Contrast checker → · Palette generator →