#21357B#21357B

#21357B is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.122 H 267.7°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#21357B
RGB	rgb(33, 53, 123)
HSL	hsl(227, 58%, 31%)
HSV	hsv(227, 73%, 48%)
CMYK	cmyk(73.2%, 56.9%, 0%, 51.8%)
CIE-LAB	lab(24.64, 17.94, -42.24)
CIE-LCH	lch(24.64, 45.89, 293.01°)
OKLab	oklab(35.7% -0.0048 -0.1216)
OKLCH	oklch(35.7% 0.122 267.7)
XYZ	xyz(5.4742, 4.2990, 19.2764)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21357B #7B6721

analogous

#21627B #21357B #3A217B

triadic

#21357B #7B2135 #357B21

tetradic

#21357B #7B2162 #7B6721 #217B3A

square

#21357B #7B2162 #7B6721 #217B3A

split-complementary

#21357B #7B3A21 #627B21

monochromatic

#070B1A #14204B #21357B #2E4AAB #4866CE

Accessibility & contrast

On white

11.29

#21357B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#21357B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21357B

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21357B	#FFFFFF	#000000	##FFFFFF
##21357B	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F7D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004652

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #21357b;
/* rgb */ color: rgb(33, 53, 123);
/* oklch */ color: oklch(35.7% 0.122 267.7);

Tailwind

colors: {
  custom: {
    50: '#696ba2',
    500: '#21357b',
    950: '#000000',
  },
}

SCSS

$custom: #21357b;
$custom-light: #696ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#21357b",
  "rgb": {
    "r": 33,
    "g": 53,
    "b": 123
  },
  "hsl": {
    "h": 226.667,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.35698,
    "c": 0.12169,
    "h": 267.7
  },
  "luminance": 0.043
}

Semantic roles & 50–950 ramp

primary

#21357B

secondary

#AE984A

accent

#BF47E1

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #21357B

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

Preview Lab → · Contrast checker → · Palette generator →