#21377B#21377B

#21377B is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.1% C 0.119 H 266.8°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#21377B
RGB	rgb(33, 55, 123)
HSL	hsl(225, 58%, 31%)
HSV	hsv(225, 73%, 48%)
CMYK	cmyk(73.2%, 55.3%, 0%, 51.8%)
CIE-LAB	lab(25.21, 16.53, -41.30)
CIE-LCH	lch(25.21, 44.49, 291.81°)
OKLab	oklab(36.13% -0.0066 -0.1188)
OKLCH	oklch(36.13% 0.119 266.8)
XYZ	xyz(5.5673, 4.4852, 19.3074)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21377B #7B6521

analogous

#21647B #21377B #38217B

triadic

#21377B #7B2137 #377B21

tetradic

#21377B #7B2164 #7B6521 #217B38

square

#21377B #7B2164 #7B6521 #217B38

split-complementary

#21377B #7B3821 #647B21

monochromatic

#070C1A #14214B #21377B #2E4DAB #4869CE

Accessibility & contrast

On white

11.07

#21377B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#21377B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21377B

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21377B	#FFFFFF	#000000	##FFFFFF
##21377B	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06407D

Deuteranopia (green-blind)

#00387A

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #21377b;
/* rgb */ color: rgb(33, 55, 123);
/* oklch */ color: oklch(36.1% 0.119 266.8);

Tailwind

colors: {
  custom: {
    50: '#696da2',
    500: '#21377b',
    950: '#000000',
  },
}

SCSS

$custom: #21377b;
$custom-light: #696da2;
$custom-dark: #000000;

JSON

{
  "hex": "#21377b",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 123
  },
  "hsl": {
    "h": 225.333,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36134,
    "c": 0.11899,
    "h": 266.8
  },
  "luminance": 0.04486
}

Semantic roles & 50–950 ramp

primary

#21377B

secondary

#AE954A

accent

#BB47E1

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #21377B

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

Preview Lab → · Contrast checker → · Palette generator →