#21399B#21399B

#21399B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.4% C 0.162 H 267.5°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#21399B
RGB	rgb(33, 57, 155)
HSL	hsl(228, 65%, 37%)
HSV	hsv(228, 79%, 61%)
CMYK	cmyk(78.7%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(28.42, 27.70, -55.92)
CIE-LCH	lch(28.42, 62.41, 296.35°)
OKLab	oklab(39.36% -0.0071 -0.1617)
OKLCH	oklch(39.36% 0.162 267.5)
XYZ	xyz(8.0047, 5.6152, 31.6660)
Luminance	0.0562 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21399B #9B8321

analogous

#21769B #21399B #46219B

triadic

#21399B #9B2139 #399B21

tetradic

#21399B #9B2176 #9B8321 #219B46

square

#21399B #9B2176 #9B8321 #219B46

split-complementary

#21399B #9B4621 #769B21

monochromatic

#0C1436 #162669 #21399B #2C4CCD #5A74DC

Accessibility & contrast

On white

9.89

#21399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#21399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21399B

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21399B	#FFFFFF	#000000	##FFFFFF
##21399B	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003D99

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #21399b;
/* rgb */ color: rgb(33, 57, 155);
/* oklch */ color: oklch(39.4% 0.162 267.5);

Tailwind

colors: {
  custom: {
    50: '#716fb9',
    500: '#21399b',
    950: '#000000',
  },
}

SCSS

$custom: #21399b;
$custom-light: #716fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#21399b",
  "rgb": {
    "r": 33,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 228.197,
    "s": 64.894,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39361,
    "c": 0.16187,
    "h": 267.5
  },
  "luminance": 0.05616
}

Semantic roles & 50–950 ramp

primary

#21399B

secondary

#C0AC58

accent

#C740E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #21399B

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

Preview Lab → · Contrast checker → · Palette generator →