#21308B#21308B

#21308B is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.151 H 269.7°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#21308B
RGB	rgb(33, 48, 139)
HSL	hsl(232, 62%, 34%)
HSV	hsv(232, 76%, 55%)
CMYK	cmyk(76.3%, 65.5%, 0%, 45.5%)
CIE-LAB	lab(24.64, 27.63, -52.26)
CIE-LCH	lch(24.64, 59.12, 297.86°)
OKLab	oklab(36.13% -0.0008 -0.1511)
OKLCH	oklch(36.13% 0.151 269.7)
XYZ	xyz(6.3428, 4.3006, 24.9169)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21308B #8B7C21

analogous

#21658B #21308B #47218B

triadic

#21308B #8B2130 #308B21

tetradic

#21308B #8B2165 #8B7C21 #218B47

square

#21308B #8B2165 #8B7C21 #218B47

split-complementary

#21308B #8B4721 #658B21

monochromatic

#0A0E28 #151F5A #21308B #2D41BC #5164D6

Accessibility & contrast

On white

11.29

#21308B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#21308B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21308B

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21308B	#FFFFFF	#000000	##FFFFFF
##21308B	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408E

Deuteranopia (green-blind)

#003689

Tritanopia (blue-blind)

#004859

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #21308b;
/* rgb */ color: rgb(33, 48, 139);
/* oklch */ color: oklch(36.1% 0.151 269.7);

Tailwind

colors: {
  custom: {
    50: '#6e68ae',
    500: '#21308b',
    950: '#000000',
  },
}

SCSS

$custom: #21308b;
$custom-light: #6e68ae;
$custom-dark: #000000;

JSON

{
  "hex": "#21308b",
  "rgb": {
    "r": 33,
    "g": 48,
    "b": 139
  },
  "hsl": {
    "h": 231.509,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.36128,
    "c": 0.15108,
    "h": 269.7
  },
  "luminance": 0.04301
}

Semantic roles & 50–950 ramp

primary

#21308B

secondary

#B9AA4F

accent

#CE43E5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #21308B

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

Preview Lab → · Contrast checker → · Palette generator →