#21289C#21289C

#21289C is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.5% C 0.183 H 270.6°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#21289C
RGB	rgb(33, 40, 156)
HSL	hsl(237, 65%, 37%)
HSV	hsv(237, 79%, 61%)
CMYK	cmyk(78.8%, 74.4%, 0%, 38.8%)
CIE-LAB	lab(24.45, 39.00, -63.06)
CIE-LCH	lch(24.45, 74.14, 301.74°)
OKLab	oklab(36.5% 0.0018 -0.1826)
OKLCH	oklch(36.5% 0.183 270.6)
XYZ	xyz(7.3847, 4.2404, 31.8753)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21289C #9C9521

analogous

#21669C #21289C #57219C

triadic

#21289C #9C2128 #289C21

tetradic

#21289C #9C2166 #9C9521 #219C57

square

#21289C #9C2166 #9C9521 #219C57

split-complementary

#21289C #9C5721 #669C21

monochromatic

#0C0E37 #161B69 #21289C #2C35CF #5B62DC

Accessibility & contrast

On white

11.36

#21289C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#21289C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21289C

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21289C	#FFFFFF	#000000	##FFFFFF
##21289C	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00409F

Deuteranopia (green-blind)

#00349A

Tritanopia (blue-blind)

#004A60

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #21289c;
/* rgb */ color: rgb(33, 40, 156);
/* oklch */ color: oklch(36.5% 0.183 270.6);

Tailwind

colors: {
  custom: {
    50: '#7363ba',
    500: '#21289c',
    950: '#000000',
  },
}

SCSS

$custom: #21289c;
$custom-light: #7363ba;
$custom-dark: #000000;

JSON

{
  "hex": "#21289c",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 156
  },
  "hsl": {
    "h": 236.585,
    "s": 65.079,
    "l": 37.059
  },
  "oklch": {
    "l": 0.36503,
    "c": 0.18261,
    "h": 270.6
  },
  "luminance": 0.04241
}

Semantic roles & 50–950 ramp

primary

#21289C

secondary

#C1BB58

accent

#DE40E8

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #21289C

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

Preview Lab → · Contrast checker → · Palette generator →