#21289B#21289B

#21289B is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.4% C 0.181 H 270.6°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#21289B
RGB	rgb(33, 40, 155)
HSL	hsl(237, 65%, 37%)
HSV	hsv(237, 79%, 61%)
CMYK	cmyk(78.7%, 74.2%, 0%, 39.2%)
CIE-LAB	lab(24.34, 38.65, -62.62)
CIE-LCH	lch(24.34, 73.59, 301.68°)
OKLab	oklab(36.39% 0.0019 -0.1813)
OKLCH	oklch(36.39% 0.181 270.6)
XYZ	xyz(7.3004, 4.2067, 31.4312)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21289B #9B9421

analogous

#21659B #21289B #57219B

triadic

#21289B #9B2128 #289B21

tetradic

#21289B #9B2165 #9B9421 #219B57

square

#21289B #9B2165 #9B9421 #219B57

split-complementary

#21289B #9B5721 #659B21

monochromatic

#0C0E36 #161B69 #21289B #2C35CD #5A62DC

Accessibility & contrast

On white

11.40

#21289B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#21289B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21289B

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21289B	#FFFFFF	#000000	##FFFFFF
##21289B	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00409E

Deuteranopia (green-blind)

#003499

Tritanopia (blue-blind)

#00495F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #21289b;
/* rgb */ color: rgb(33, 40, 155);
/* oklch */ color: oklch(36.4% 0.181 270.6);

Tailwind

colors: {
  custom: {
    50: '#7263ba',
    500: '#21289b',
    950: '#000000',
  },
}

SCSS

$custom: #21289b;
$custom-light: #7263ba;
$custom-dark: #000000;

JSON

{
  "hex": "#21289b",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 155
  },
  "hsl": {
    "h": 236.557,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36394,
    "c": 0.18135,
    "h": 270.6
  },
  "luminance": 0.04207
}

Semantic roles & 50–950 ramp

primary

#21289B

secondary

#C0BA58

accent

#DE40E8

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #21289B

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

Preview Lab → · Contrast checker → · Palette generator →