#21428B#21428B

#21428B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.9% C 0.128 H 263.4°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#21428B
RGB	rgb(33, 66, 139)
HSL	hsl(221, 62%, 34%)
HSV	hsv(221, 76%, 55%)
CMYK	cmyk(76.3%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(29.62, 15.25, -44.16)
CIE-LCH	lch(29.62, 46.72, 289.05°)
OKLab	oklab(39.86% -0.0146 -0.127)
OKLCH	oklch(39.86% 0.128 263.4)
XYZ	xyz(7.2340, 6.0830, 25.2140)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21428B #8B6A21

analogous

#21778B #21428B #35218B

triadic

#21428B #8B2142 #428B21

tetradic

#21428B #8B2177 #8B6A21 #218B35

square

#21428B #8B2177 #8B6A21 #218B35

split-complementary

#21428B #8B3521 #778B21

monochromatic

#0A1328 #152B5A #21428B #2D59BC #517AD6

Accessibility & contrast

On white

9.47

#21428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#21428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21428B

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21428B	#FFFFFF	#000000	##FFFFFF
##21428B	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144B8E

Deuteranopia (green-blind)

#00418A

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #21428b;
/* rgb */ color: rgb(33, 66, 139);
/* oklch */ color: oklch(39.9% 0.128 263.4);

Tailwind

colors: {
  custom: {
    50: '#6c75ad',
    500: '#21428b',
    950: '#000000',
  },
}

SCSS

$custom: #21428b;
$custom-light: #6c75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#21428b",
  "rgb": {
    "r": 33,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 221.321,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.39858,
    "c": 0.12786,
    "h": 263.4
  },
  "luminance": 0.06084
}

Semantic roles & 50–950 ramp

primary

#21428B

secondary

#B9984F

accent

#B243E5

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #21428B

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

Preview Lab → · Contrast checker → · Palette generator →