#21256B#21256B

#21256B is a dark, moderate blue. Relative luminance 0.027; OKLCH L 31.0% C 0.120 H 274.5°. Best body text is #FFFFFF at 13.62:1 contrast (WCAG AA passes).

Color values

HEX	#21256B
RGB	rgb(33, 37, 107)
HSL	hsl(237, 53%, 27%)
HSV	hsv(237, 69%, 42%)
CMYK	cmyk(69.2%, 65.4%, 0%, 58%)
CIE-LAB	lab(18.83, 22.93, -41.42)
CIE-LCH	lch(18.83, 47.34, 298.97°)
OKLab	oklab(30.95% 0.0093 -0.1194)
OKLCH	oklch(30.95% 0.12 274.5)
XYZ	xyz(3.9417, 2.7077, 14.2220)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21256B #6B6721

analogous

#214A6B #21256B #42216B

triadic

#21256B #6B2125 #256B21

tetradic

#21256B #6B214A #6B6721 #216B42

square

#21256B #6B214A #6B6721 #216B42

split-complementary

#21256B #6B4221 #4A6B21

monochromatic

#070817 #13153C #21256B #2F359A #4249C5

Accessibility & contrast

On white

13.62

#21256B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#21256B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21256B

13.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21256B	#FFFFFF	#000000	##FFFFFF
##21256B	1.00	13.62	1.54	13.62
#FFFFFF	13.62	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00316D

Deuteranopia (green-blind)

#002B6A

Tritanopia (blue-blind)

#003744

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #21256b;
/* rgb */ color: rgb(33, 37, 107);
/* oklch */ color: oklch(31.0% 0.120 274.5);

Tailwind

colors: {
  custom: {
    50: '#675f96',
    500: '#21256b',
    950: '#000000',
  },
}

SCSS

$custom: #21256b;
$custom-light: #675f96;
$custom-dark: #000000;

JSON

{
  "hex": "#21256b",
  "rgb": {
    "r": 33,
    "g": 37,
    "b": 107
  },
  "hsl": {
    "h": 236.757,
    "s": 52.857,
    "l": 27.451
  },
  "oklch": {
    "l": 0.30953,
    "c": 0.11975,
    "h": 274.5
  },
  "luminance": 0.02708
}

Semantic roles & 50–950 ramp

primary

#21256B

secondary

#9F9A49

accent

#D44CDC

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #21256B

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

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