#21399E#21399E

#21399E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.6% C 0.166 H 267.5°. Best body text is #FFFFFF at 9.80:1 contrast (WCAG AA passes).

Color values

HEX	#21399E
RGB	rgb(33, 57, 158)
HSL	hsl(228, 65%, 37%)
HSV	hsv(228, 79%, 62%)
CMYK	cmyk(79.1%, 63.9%, 0%, 38%)
CIE-LAB	lab(28.69, 28.85, -57.31)
CIE-LCH	lch(28.69, 64.16, 296.72°)
OKLab	oklab(39.64% -0.0072 -0.1658)
OKLCH	oklch(39.64% 0.166 267.5)
XYZ	xyz(8.2597, 5.7173, 33.0093)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21399E #9E8621

analogous

#21789E #21399E #48219E

triadic

#21399E #9E2139 #399E21

tetradic

#21399E #9E2178 #9E8621 #219E48

square

#21399E #9E2178 #9E8621 #219E48

split-complementary

#21399E #9E4821 #789E21

monochromatic

#0C1439 #16276B #21399E #2C4BD1 #5C75DD

Accessibility & contrast

On white

9.80

#21399E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#21399E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21399E

9.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21399E	#FFFFFF	#000000	##FFFFFF
##21399E	1.00	9.80	2.14	9.80
#FFFFFF	9.80	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA1

Deuteranopia (green-blind)

#003E9C

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #21399e;
/* rgb */ color: rgb(33, 57, 158);
/* oklch */ color: oklch(39.6% 0.166 267.5);

Tailwind

colors: {
  custom: {
    50: '#726fbc',
    500: '#21399e',
    950: '#000000',
  },
}

SCSS

$custom: #21399e;
$custom-light: #726fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#21399e",
  "rgb": {
    "r": 33,
    "g": 57,
    "b": 158
  },
  "hsl": {
    "h": 228.48,
    "s": 65.445,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39641,
    "c": 0.16593,
    "h": 267.5
  },
  "luminance": 0.05718
}

Semantic roles & 50–950 ramp

primary

#21399E

secondary

#C1AD59

accent

#C83FE8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #21399E

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

Preview Lab → · Contrast checker → · Palette generator →