#21287B#21287B

#21287B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.139 H 272.4°. Best body text is #FFFFFF at 12.69:1 contrast (WCAG AA passes).

Color values

HEX	#21287B
RGB	rgb(33, 40, 123)
HSL	hsl(235, 58%, 31%)
HSV	hsv(235, 73%, 48%)
CMYK	cmyk(73.2%, 67.5%, 0%, 51.8%)
CIE-LAB	lab(21.10, 26.95, -48.01)
CIE-LCH	lch(21.10, 55.05, 299.31°)
OKLab	oklab(33.07% 0.0058 -0.1387)
OKLCH	oklch(33.07% 0.139 272.4)
XYZ	xyz(4.9599, 3.2705, 19.1049)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21287B #7B7421

analogous

#21557B #21287B #47217B

triadic

#21287B #7B2128 #287B21

tetradic

#21287B #7B2155 #7B7421 #217B47

square

#21287B #7B2155 #7B7421 #217B47

split-complementary

#21287B #7B4721 #557B21

monochromatic

#07091A #14184B #21287B #2E38AB #4853CE

Accessibility & contrast

On white

12.69

#21287B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#21287B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21287B

12.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21287B	#FFFFFF	#000000	##FFFFFF
##21287B	1.00	12.69	1.65	12.69
#FFFFFF	12.69	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377E

Deuteranopia (green-blind)

#002F79

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #21287b;
/* rgb */ color: rgb(33, 40, 123);
/* oklch */ color: oklch(33.1% 0.139 272.4);

Tailwind

colors: {
  custom: {
    50: '#6a62a2',
    500: '#21287b',
    950: '#000000',
  },
}

SCSS

$custom: #21287b;
$custom-light: #6a62a2;
$custom-dark: #000000;

JSON

{
  "hex": "#21287b",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 123
  },
  "hsl": {
    "h": 235.333,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3307,
    "c": 0.13881,
    "h": 272.4
  },
  "luminance": 0.03271
}

Semantic roles & 50–950 ramp

primary

#21287B

secondary

#AEA64A

accent

#D547E1

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #21287B

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

Preview Lab → · Contrast checker → · Palette generator →