#21519B#21519B

#21519B is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.4% C 0.132 H 259.0°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#21519B
RGB	rgb(33, 81, 155)
HSL	hsl(216, 65%, 37%)
HSV	hsv(216, 79%, 61%)
CMYK	cmyk(78.7%, 47.7%, 0%, 39.2%)
CIE-LAB	lab(35.15, 11.44, -45.00)
CIE-LCH	lch(35.15, 46.43, 284.26°)
OKLab	oklab(44.45% -0.025 -0.1292)
OKLCH	oklch(44.45% 0.132 259)
XYZ	xyz(9.4839, 8.5736, 32.1590)
Luminance	0.0858 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21519B #9B6B21

analogous

#218E9B #21519B #2E219B

triadic

#21519B #9B2151 #519B21

tetradic

#21519B #9B218E #9B6B21 #219B2E

square

#21519B #9B218E #9B6B21 #219B2E

split-complementary

#21519B #9B2E21 #8E9B21

monochromatic

#0C1C36 #163769 #21519B #2C6BCD #5A8DDC

Accessibility & contrast

On white

7.73

#21519B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#21519B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21519B

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21519B	#FFFFFF	#000000	##FFFFFF
##21519B	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29599E

Deuteranopia (green-blind)

#064D9A

Tritanopia (blue-blind)

#00636E

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #21519b;
/* rgb */ color: rgb(33, 81, 155);
/* oklch */ color: oklch(44.4% 0.132 259.0);

Tailwind

colors: {
  custom: {
    50: '#6f81b9',
    500: '#21519b',
    950: '#000000',
  },
}

SCSS

$custom: #21519b;
$custom-light: #6f81b9;
$custom-dark: #000000;

JSON

{
  "hex": "#21519b",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 155
  },
  "hsl": {
    "h": 216.393,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.44449,
    "c": 0.1316,
    "h": 259
  },
  "luminance": 0.08575
}

Semantic roles & 50–950 ramp

primary

#21519B

secondary

#C09758

accent

#A640E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #21519B

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

Preview Lab → · Contrast checker → · Palette generator →