#21288B#21288B

#21288B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.7% C 0.161 H 271.5°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#21288B
RGB	rgb(33, 40, 139)
HSL	hsl(236, 62%, 34%)
HSV	hsv(236, 76%, 55%)
CMYK	cmyk(76.3%, 71.2%, 0%, 45.5%)
CIE-LAB	lab(22.67, 32.90, -55.50)
CIE-LCH	lch(22.67, 64.52, 300.66°)
OKLab	oklab(34.69% 0.0042 -0.1606)
OKLCH	oklch(34.69% 0.161 271.5)
XYZ	xyz(6.0446, 3.7044, 24.8175)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21288B #8B8421

analogous

#215D8B #21288B #4F218B

triadic

#21288B #8B2128 #288B21

tetradic

#21288B #8B215D #8B8421 #218B4F

square

#21288B #8B215D #8B8421 #218B4F

split-complementary

#21288B #8B4F21 #5D8B21

monochromatic

#0A0C28 #151A5A #21288B #2D36BC #515AD6

Accessibility & contrast

On white

12.06

#21288B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#21288B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21288B

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21288B	#FFFFFF	#000000	##FFFFFF
##21288B	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8E

Deuteranopia (green-blind)

#003189

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #21288b;
/* rgb */ color: rgb(33, 40, 139);
/* oklch */ color: oklch(34.7% 0.161 271.5);

Tailwind

colors: {
  custom: {
    50: '#6e62ae',
    500: '#21288b',
    950: '#000000',
  },
}

SCSS

$custom: #21288b;
$custom-light: #6e62ae;
$custom-dark: #000000;

JSON

{
  "hex": "#21288b",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 139
  },
  "hsl": {
    "h": 236.038,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.34691,
    "c": 0.16064,
    "h": 271.5
  },
  "luminance": 0.03705
}

Semantic roles & 50–950 ramp

primary

#21288B

secondary

#B9B24F

accent

#DA43E5

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #21288B

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

Preview Lab → · Contrast checker → · Palette generator →