#21237B#21237B

#21237B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.2% C 0.145 H 273.7°. Best body text is #FFFFFF at 13.20:1 contrast (WCAG AA passes).

Color values

HEX	#21237B
RGB	rgb(33, 35, 123)
HSL	hsl(239, 58%, 31%)
HSV	hsv(239, 73%, 48%)
CMYK	cmyk(73.2%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(19.86, 30.26, -50.03)
CIE-LCH	lch(19.86, 58.47, 301.17°)
OKLab	oklab(32.17% 0.0093 -0.1446)
OKLCH	oklch(32.17% 0.145 273.7)
XYZ	xyz(4.8022, 2.9550, 19.0523)
Luminance	0.0295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21237B #7B7921

analogous

#21507B #21237B #4C217B

triadic

#21237B #7B2123 #237B21

tetradic

#21237B #7B2150 #7B7921 #217B4C

square

#21237B #7B2150 #7B7921 #217B4C

split-complementary

#21237B #7B4C21 #507B21

monochromatic

#07081A #14154B #21237B #2E31AB #484BCE

Accessibility & contrast

On white

13.20

#21237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#21237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21237B

13.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21237B	#FFFFFF	#000000	##FFFFFF
##21237B	1.00	13.20	1.59	13.20
#FFFFFF	13.20	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002C79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #21237b;
/* rgb */ color: rgb(33, 35, 123);
/* oklch */ color: oklch(32.2% 0.145 273.7);

Tailwind

colors: {
  custom: {
    50: '#6b5ea2',
    500: '#21237b',
    950: '#000000',
  },
}

SCSS

$custom: #21237b;
$custom-light: #6b5ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#21237b",
  "rgb": {
    "r": 33,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 238.667,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32175,
    "c": 0.14492,
    "h": 273.7
  },
  "luminance": 0.02955
}

Semantic roles & 50–950 ramp

primary

#21237B

secondary

#AEAC4A

accent

#DE47E1

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #21237B

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

Preview Lab → · Contrast checker → · Palette generator →