#21399C#21399C

#21399C is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.5% C 0.163 H 267.5°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#21399C
RGB	rgb(33, 57, 156)
HSL	hsl(228, 65%, 37%)
HSV	hsv(228, 79%, 61%)
CMYK	cmyk(78.8%, 63.5%, 0%, 38.8%)
CIE-LAB	lab(28.51, 28.08, -56.38)
CIE-LCH	lch(28.51, 62.99, 296.48°)
OKLab	oklab(39.45% -0.0071 -0.1631)
OKLCH	oklch(39.45% 0.163 267.5)
XYZ	xyz(8.0890, 5.6490, 32.1101)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21399C #9C8421

analogous

#21769C #21399C #47219C

triadic

#21399C #9C2139 #399C21

tetradic

#21399C #9C2176 #9C8421 #219C47

square

#21399C #9C2176 #9C8421 #219C47

split-complementary

#21399C #9C4721 #769C21

monochromatic

#0C1437 #162769 #21399C #2C4BCF #5B74DC

Accessibility & contrast

On white

9.86

#21399C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#21399C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21399C

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21399C	#FFFFFF	#000000	##FFFFFF
##21399C	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499F

Deuteranopia (green-blind)

#003E9A

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #21399c;
/* rgb */ color: rgb(33, 57, 156);
/* oklch */ color: oklch(39.5% 0.163 267.5);

Tailwind

colors: {
  custom: {
    50: '#716fba',
    500: '#21399c',
    950: '#000000',
  },
}

SCSS

$custom: #21399c;
$custom-light: #716fba;
$custom-dark: #000000;

JSON

{
  "hex": "#21399c",
  "rgb": {
    "r": 33,
    "g": 57,
    "b": 156
  },
  "hsl": {
    "h": 228.293,
    "s": 65.079,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39454,
    "c": 0.16323,
    "h": 267.5
  },
  "luminance": 0.0565
}

Semantic roles & 50–950 ramp

primary

#21399C

secondary

#C1AC58

accent

#C740E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #21399C

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

Preview Lab → · Contrast checker → · Palette generator →