#21378C#21378C

#21378C is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.6% C 0.144 H 267.7°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#21378C
RGB	rgb(33, 55, 140)
HSL	hsl(228, 62%, 34%)
HSV	hsv(228, 76%, 55%)
CMYK	cmyk(76.4%, 60.7%, 0%, 45.1%)
CIE-LAB	lab(26.59, 23.24, -49.70)
CIE-LCH	lch(26.59, 54.87, 295.06°)
OKLab	oklab(37.6% -0.0058 -0.1435)
OKLCH	oklch(37.6% 0.144 267.7)
XYZ	xyz(6.7254, 4.9484, 25.4066)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21378C #8C7621

analogous

#216D8C #21378C #41218C

triadic

#21378C #8C2137 #378C21

tetradic

#21378C #8C216D #8C7621 #218C41

square

#21378C #8C216D #8C7621 #218C41

split-complementary

#21378C #8C4121 #6D8C21

monochromatic

#0A1029 #15245A #21378C #2D4ABE #516DD6

Accessibility & contrast

On white

10.55

#21378C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#21378C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21378C

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21378C	#FFFFFF	#000000	##FFFFFF
##21378C	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448F

Deuteranopia (green-blind)

#003A8A

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #21378c;
/* rgb */ color: rgb(33, 55, 140);
/* oklch */ color: oklch(37.6% 0.144 267.7);

Tailwind

colors: {
  custom: {
    50: '#6d6dae',
    500: '#21378c',
    950: '#000000',
  },
}

SCSS

$custom: #21378c;
$custom-light: #6d6dae;
$custom-dark: #000000;

JSON

{
  "hex": "#21378c",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 140
  },
  "hsl": {
    "h": 227.664,
    "s": 61.85,
    "l": 33.922
  },
  "oklch": {
    "l": 0.37596,
    "c": 0.14362,
    "h": 267.7
  },
  "luminance": 0.04949
}

Semantic roles & 50–950 ramp

primary

#21378C

secondary

#B9A44F

accent

#C443E5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #21378C

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

Preview Lab → · Contrast checker → · Palette generator →