#21307A#21307A

#21307A is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.6% C 0.127 H 269.8°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#21307A
RGB	rgb(33, 48, 122)
HSL	hsl(230, 57%, 30%)
HSV	hsv(230, 73%, 48%)
CMYK	cmyk(73%, 60.7%, 0%, 52.2%)
CIE-LAB	lab(23.14, 21.05, -44.03)
CIE-LCH	lch(23.14, 48.80, 295.55°)
OKLab	oklab(34.55% -0.0005 -0.1269)
OKLCH	oklch(34.55% 0.127 269.8)
XYZ	xyz(5.1958, 3.8419, 18.8763)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21307A #7A6B21

analogous

#215C7A #21307A #3F217A

triadic

#21307A #7A2130 #307A21

tetradic

#21307A #7A215C #7A6B21 #217A3F

square

#21307A #7A215C #7A6B21 #217A3F

split-complementary

#21307A #7A3F21 #5C7A21

monochromatic

#070A1A #141D4A #21307A #2E43AA #485ECD

Accessibility & contrast

On white

11.88

#21307A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#21307A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21307A

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21307A	#FFFFFF	#000000	##FFFFFF
##21307A	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7C

Deuteranopia (green-blind)

#003379

Tritanopia (blue-blind)

#004250

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #21307a;
/* rgb */ color: rgb(33, 48, 122);
/* oklch */ color: oklch(34.6% 0.127 269.8);

Tailwind

colors: {
  custom: {
    50: '#6968a1',
    500: '#21307a',
    950: '#000000',
  },
}

SCSS

$custom: #21307a;
$custom-light: #6968a1;
$custom-dark: #000000;

JSON

{
  "hex": "#21307a",
  "rgb": {
    "r": 33,
    "g": 48,
    "b": 122
  },
  "hsl": {
    "h": 229.888,
    "s": 57.419,
    "l": 30.392
  },
  "oklch": {
    "l": 0.34552,
    "c": 0.12694,
    "h": 269.8
  },
  "luminance": 0.03842
}

Semantic roles & 50–950 ramp

primary

#21307A

secondary

#AD9C4A

accent

#C747E1

background

#F6F6FA

surface

#ECEBF3

border

#C7C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #21307A

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

Preview Lab → · Contrast checker → · Palette generator →