#21356B#21356B

#21356B is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.4% C 0.097 H 266.1°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#21356B
RGB	rgb(33, 53, 107)
HSL	hsl(224, 53%, 27%)
HSV	hsv(224, 69%, 42%)
CMYK	cmyk(69.2%, 50.5%, 0%, 58%)
CIE-LAB	lab(23.44, 11.59, -33.96)
CIE-LCH	lch(23.44, 35.88, 288.84°)
OKLab	oklab(34.41% -0.0066 -0.0972)
OKLCH	oklch(34.41% 0.097 266.1)
XYZ	xyz(4.5532, 3.9306, 14.4258)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21356B #6B5721

analogous

#215A6B #21356B #32216B

triadic

#21356B #6B2135 #356B21

tetradic

#21356B #6B215A #6B5721 #216B32

square

#21356B #6B215A #6B5721 #216B32

split-complementary

#21356B #6B3221 #5A6B21

monochromatic

#070C17 #131E3C #21356B #2F4C9A #4265C5

Accessibility & contrast

On white

11.76

#21356B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#21356B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21356B

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21356B	#FFFFFF	#000000	##FFFFFF
##21356B	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193B6D

Deuteranopia (green-blind)

#09356A

Tritanopia (blue-blind)

#00414A

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #21356b;
/* rgb */ color: rgb(33, 53, 107);
/* oklch */ color: oklch(34.4% 0.097 266.1);

Tailwind

colors: {
  custom: {
    50: '#656b96',
    500: '#21356b',
    950: '#000000',
  },
}

SCSS

$custom: #21356b;
$custom-light: #656b96;
$custom-dark: #000000;

JSON

{
  "hex": "#21356b",
  "rgb": {
    "r": 33,
    "g": 53,
    "b": 107
  },
  "hsl": {
    "h": 223.784,
    "s": 52.857,
    "l": 27.451
  },
  "oklch": {
    "l": 0.34411,
    "c": 0.09745,
    "h": 266.1
  },
  "luminance": 0.03931
}

Semantic roles & 50–950 ramp

primary

#21356B

secondary

#9F8849

accent

#B54CDC

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #21356B

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

Preview Lab → · Contrast checker → · Palette generator →