#281B71#281B71

#281B71 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.139 H 281.1°. Best body text is #FFFFFF at 14.14:1 contrast (WCAG AA passes).

Color values

HEX	#281B71
RGB	rgb(40, 27, 113)
HSL	hsl(249, 61%, 27%)
HSV	hsv(249, 76%, 44%)
CMYK	cmyk(64.6%, 76.1%, 0%, 55.7%)
CIE-LAB	lab(17.58, 32.66, -47.34)
CIE-LCH	lch(17.58, 57.51, 304.60°)
OKLab	oklab(30.38% 0.0267 -0.1365)
OKLCH	oklch(30.38% 0.139 281.1)
XYZ	xyz(4.2467, 2.4269, 15.8642)
Luminance	0.0243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B71 #64711B

analogous

#1B3971 #281B71 #531B71

triadic

#281B71 #71281B #1B7128

tetradic

#281B71 #711B39 #64711B #1B7153

square

#281B71 #711B39 #64711B #1B7153

split-complementary

#281B71 #71531B #39711B

monochromatic

#090619 #170F40 #281B71 #3927A2 #4E37CF

Accessibility & contrast

On white

14.14

#281B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#281B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B71

14.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B71	#FFFFFF	#000000	##FFFFFF
##281B71	1.00	14.14	1.49	14.14
#FFFFFF	14.14	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E74

Deuteranopia (green-blind)

#00286F

Tritanopia (blue-blind)

#003344

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #281b71;
/* rgb */ color: rgb(40, 27, 113);
/* oklch */ color: oklch(30.4% 0.139 281.1);

Tailwind

colors: {
  custom: {
    50: '#6c599b',
    500: '#281b71',
    950: '#000000',
  },
}

SCSS

$custom: #281b71;
$custom-light: #6c599b;
$custom-dark: #000000;

JSON

{
  "hex": "#281b71",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 113
  },
  "hsl": {
    "h": 249.07,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.30376,
    "c": 0.1391,
    "h": 281.1
  },
  "luminance": 0.02427
}

Semantic roles & 50–950 ramp

primary

#281B71

secondary

#97A642

accent

#E543CC

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#08030E

muted

#7A787E

Preview Lab

Preview with #281B71

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

Preview Lab → · Contrast checker → · Palette generator →