#21309D#21309D

#21309D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.9% C 0.175 H 269.3°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#21309D
RGB	rgb(33, 48, 157)
HSL	hsl(233, 65%, 37%)
HSV	hsv(233, 79%, 62%)
CMYK	cmyk(79%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(26.36, 34.38, -60.51)
CIE-LCH	lch(26.36, 69.60, 299.60°)
OKLab	oklab(37.91% -0.0021 -0.1752)
OKLCH	oklch(37.91% 0.175 269.3)
XYZ	xyz(7.7679, 4.8707, 32.4225)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21309D #9D8E21

analogous

#216E9D #21309D #50219D

triadic

#21309D #9D2130 #309D21

tetradic

#21309D #9D216E #9D8E21 #219D50

square

#21309D #9D216E #9D8E21 #219D50

split-complementary

#21309D #9D5021 #6E9D21

monochromatic

#0C1138 #16216A #21309D #2C3FD0 #5C6BDD

Accessibility & contrast

On white

10.64

#21309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#21309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21309D

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21309D	#FFFFFF	#000000	##FFFFFF
##21309D	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A0

Deuteranopia (green-blind)

#00389B

Tritanopia (blue-blind)

#004E62

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #21309d;
/* rgb */ color: rgb(33, 48, 157);
/* oklch */ color: oklch(37.9% 0.175 269.3);

Tailwind

colors: {
  custom: {
    50: '#7268bb',
    500: '#21309d',
    950: '#000000',
  },
}

SCSS

$custom: #21309d;
$custom-light: #7268bb;
$custom-dark: #000000;

JSON

{
  "hex": "#21309d",
  "rgb": {
    "r": 33,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 232.742,
    "s": 65.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.3791,
    "c": 0.17522,
    "h": 269.3
  },
  "luminance": 0.04872
}

Semantic roles & 50–950 ramp

primary

#21309D

secondary

#C1B459

accent

#D440E8

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #21309D

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

Preview Lab → · Contrast checker → · Palette generator →