#281F5B#281F5B

#281F5B is a dark, moderate blue. Relative luminance 0.022; OKLCH L 28.9% C 0.103 H 284.8°. Best body text is #FFFFFF at 14.61:1 contrast (WCAG AA passes).

Color values

HEX	#281F5B
RGB	rgb(40, 31, 91)
HSL	hsl(249, 49%, 24%)
HSV	hsv(249, 66%, 36%)
CMYK	cmyk(56%, 65.9%, 0%, 64.3%)
CIE-LAB	lab(16.44, 22.53, -34.75)
CIE-LCH	lch(16.44, 41.41, 302.95°)
OKLab	oklab(28.9% 0.0263 -0.0996)
OKLCH	oklch(28.9% 0.103 284.8)
XYZ	xyz(3.2528, 2.1862, 10.1461)
Luminance	0.0219 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F5B #525B1F

analogous

#1F345B #281F5B #461F5B

triadic

#281F5B #5B281F #1F5B28

tetradic

#281F5B #5B1F34 #525B1F #1F5B46

square

#281F5B #5B1F34 #525B1F #1F5B46

split-complementary

#281F5B #5B461F #345B1F

monochromatic

#0A0817 #140F2D #281F5B #3C2F89 #503EB6

Accessibility & contrast

On white

14.61

#281F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#281F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F5B

14.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F5B	#FFFFFF	#000000	##FFFFFF
##281F5B	1.00	14.61	1.44	14.61
#FFFFFF	14.61	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A5D

Deuteranopia (green-blind)

#00275A

Tritanopia (blue-blind)

#142D39

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #281f5b;
/* rgb */ color: rgb(40, 31, 91);
/* oklch */ color: oklch(28.9% 0.103 284.8);

Tailwind

colors: {
  custom: {
    50: '#675b8a',
    500: '#281f5b',
    950: '#000000',
  },
}

SCSS

$custom: #281f5b;
$custom-light: #675b8a;
$custom-dark: #000000;

JSON

{
  "hex": "#281f5b",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 91
  },
  "hsl": {
    "h": 249,
    "s": 49.18,
    "l": 23.922
  },
  "oklch": {
    "l": 0.28905,
    "c": 0.10301,
    "h": 284.8
  },
  "luminance": 0.02186
}

Semantic roles & 50–950 ramp

primary

#281F5B

secondary

#859046

accent

#D94FC4

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06040C

muted

#7A797D

Preview Lab

Preview with #281F5B

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

Preview Lab → · Contrast checker → · Palette generator →