#281F5A#281F5A

#281F5A is a dark, moderate blue. Relative luminance 0.022; OKLCH L 28.8% C 0.102 H 285.0°. Best body text is #FFFFFF at 14.65:1 contrast (WCAG AA passes).

Color values

HEX	#281F5A
RGB	rgb(40, 31, 90)
HSL	hsl(249, 49%, 24%)
HSV	hsv(249, 66%, 35%)
CMYK	cmyk(55.6%, 65.6%, 0%, 64.7%)
CIE-LAB	lab(16.35, 22.18, -34.22)
CIE-LCH	lch(16.35, 40.78, 302.95°)
OKLab	oklab(28.82% 0.0264 -0.098)
OKLCH	oklch(28.82% 0.102 285)
XYZ	xyz(3.2100, 2.1691, 9.9204)
Luminance	0.0217 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F5A #515A1F

analogous

#1F335A #281F5A #451F5A

triadic

#281F5A #5A281F #1F5A28

tetradic

#281F5A #5A1F33 #515A1F #1F5A45

square

#281F5A #5A1F33 #515A1F #1F5A45

split-complementary

#281F5A #5A451F #335A1F

monochromatic

#0A0817 #140F2C #281F5A #3C2F88 #503EB5

Accessibility & contrast

On white

14.65

#281F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#281F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F5A

14.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F5A	#FFFFFF	#000000	##FFFFFF
##281F5A	1.00	14.65	1.43	14.65
#FFFFFF	14.65	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A5C

Deuteranopia (green-blind)

#002759

Tritanopia (blue-blind)

#152D39

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #281f5a;
/* rgb */ color: rgb(40, 31, 90);
/* oklch */ color: oklch(28.8% 0.102 285.0);

Tailwind

colors: {
  custom: {
    50: '#675b89',
    500: '#281f5a',
    950: '#000000',
  },
}

SCSS

$custom: #281f5a;
$custom-light: #675b89;
$custom-dark: #000000;

JSON

{
  "hex": "#281f5a",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 90
  },
  "hsl": {
    "h": 249.153,
    "s": 48.76,
    "l": 23.725
  },
  "oklch": {
    "l": 0.28816,
    "c": 0.10152,
    "h": 285
  },
  "luminance": 0.02169
}

Semantic roles & 50–950 ramp

primary

#281F5A

secondary

#848F46

accent

#D84FC3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06040B

muted

#7A797C

Preview Lab

Preview with #281F5A

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

Preview Lab → · Contrast checker → · Palette generator →