#21388B#21388B

#21388B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.141 H 267.3°. Best body text is #FFFFFF at 10.48:1 contrast (WCAG AA passes).

Color values

HEX	#21388B
RGB	rgb(33, 56, 139)
HSL	hsl(227, 62%, 34%)
HSV	hsv(227, 76%, 55%)
CMYK	cmyk(76.3%, 59.7%, 0%, 45.5%)
CIE-LAB	lab(26.78, 22.16, -48.77)
CIE-LCH	lch(26.78, 53.57, 294.43°)
OKLab	oklab(37.71% -0.0065 -0.1407)
OKLCH	oklch(37.71% 0.141 267.3)
XYZ	xyz(6.7000, 5.0150, 25.0360)
Luminance	0.0502 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21388B #8B7421

analogous

#216D8B #21388B #3F218B

triadic

#21388B #8B2138 #388B21

tetradic

#21388B #8B216D #8B7421 #218B3F

square

#21388B #8B216D #8B7421 #218B3F

split-complementary

#21388B #8B3F21 #6D8B21

monochromatic

#0A1028 #15245A #21388B #2D4CBC #516ED6

Accessibility & contrast

On white

10.48

#21388B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#21388B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21388B

10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21388B	#FFFFFF	#000000	##FFFFFF
##21388B	1.00	10.48	2.00	10.48
#FFFFFF	10.48	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448E

Deuteranopia (green-blind)

#003B89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #21388b;
/* rgb */ color: rgb(33, 56, 139);
/* oklch */ color: oklch(37.7% 0.141 267.3);

Tailwind

colors: {
  custom: {
    50: '#6d6eae',
    500: '#21388b',
    950: '#000000',
  },
}

SCSS

$custom: #21388b;
$custom-light: #6d6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#21388b",
  "rgb": {
    "r": 33,
    "g": 56,
    "b": 139
  },
  "hsl": {
    "h": 226.981,
    "s": 61.628,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37712,
    "c": 0.1409,
    "h": 267.3
  },
  "luminance": 0.05016
}

Semantic roles & 50–950 ramp

primary

#21388B

secondary

#B9A24F

accent

#C243E5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #21388B

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

Preview Lab → · Contrast checker → · Palette generator →