#21257B#21257B

#21257B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.143 H 273.2°. Best body text is #FFFFFF at 13.00:1 contrast (WCAG AA passes).

Color values

HEX	#21257B
RGB	rgb(33, 37, 123)
HSL	hsl(237, 58%, 31%)
HSV	hsv(237, 73%, 48%)
CMYK	cmyk(73.2%, 69.9%, 0%, 51.8%)
CIE-LAB	lab(20.35, 28.95, -49.24)
CIE-LCH	lch(20.35, 57.12, 300.46°)
OKLab	oklab(32.52% 0.008 -0.1423)
OKLCH	oklch(32.52% 0.143 273.2)
XYZ	xyz(4.8627, 3.0761, 19.0725)
Luminance	0.0308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21257B #7B7721

analogous

#21527B #21257B #4A217B

triadic

#21257B #7B2125 #257B21

tetradic

#21257B #7B2152 #7B7721 #217B4A

square

#21257B #7B2152 #7B7721 #217B4A

split-complementary

#21257B #7B4A21 #527B21

monochromatic

#07081A #14164B #21257B #2E34AB #484ECE

Accessibility & contrast

On white

13.00

#21257B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#21257B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21257B

13.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21257B	#FFFFFF	#000000	##FFFFFF
##21257B	1.00	13.00	1.62	13.00
#FFFFFF	13.00	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	13.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #21257b;
/* rgb */ color: rgb(33, 37, 123);
/* oklch */ color: oklch(32.5% 0.143 273.2);

Tailwind

colors: {
  custom: {
    50: '#6b60a2',
    500: '#21257b',
    950: '#000000',
  },
}

SCSS

$custom: #21257b;
$custom-light: #6b60a2;
$custom-dark: #000000;

JSON

{
  "hex": "#21257b",
  "rgb": {
    "r": 33,
    "g": 37,
    "b": 123
  },
  "hsl": {
    "h": 237.333,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32524,
    "c": 0.14252,
    "h": 273.2
  },
  "luminance": 0.03077
}

Semantic roles & 50–950 ramp

primary

#21257B

secondary

#AEA94A

accent

#DA47E1

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #21257B

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

Preview Lab → · Contrast checker → · Palette generator →