#281F9A#281F9A

#281F9A is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.4% C 0.187 H 274.4°. Best body text is #FFFFFF at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#281F9A
RGB	rgb(40, 31, 154)
HSL	hsl(244, 66%, 36%)
HSV	hsv(244, 80%, 60%)
CMYK	cmyk(74%, 79.9%, 0%, 39.6%)
CIE-LAB	lab(22.87, 43.96, -64.43)
CIE-LCH	lch(22.87, 78.00, 304.31°)
OKLab	oklab(35.44% 0.0144 -0.1863)
OKLCH	oklch(35.44% 0.187 274.4)
XYZ	xyz(7.1959, 3.7635, 30.9128)
Luminance	0.0376 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F9A #919A1F

analogous

#1F549A #281F9A #661F9A

triadic

#281F9A #9A281F #1F9A28

tetradic

#281F9A #9A1F54 #919A1F #1F9A66

square

#281F9A #9A1F54 #919A1F #1F9A66

split-complementary

#281F9A #9A661F #549A1F

monochromatic

#0E0A34 #1B1567 #281F9A #3529CD #6056DD

Accessibility & contrast

On white

11.98

#281F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#281F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F9A

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F9A	#FFFFFF	#000000	##FFFFFF
##281F9A	1.00	11.98	1.75	11.98
#FFFFFF	11.98	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9D

Deuteranopia (green-blind)

#003198

Tritanopia (blue-blind)

#00455C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #281f9a;
/* rgb */ color: rgb(40, 31, 154);
/* oklch */ color: oklch(35.4% 0.187 274.4);

Tailwind

colors: {
  custom: {
    50: '#755eb9',
    500: '#281f9a',
    950: '#000000',
  },
}

SCSS

$custom: #281f9a;
$custom-light: #755eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#281f9a",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 154
  },
  "hsl": {
    "h": 244.39,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.35437,
    "c": 0.18689,
    "h": 274.4
  },
  "luminance": 0.03764
}

Semantic roles & 50–950 ramp

primary

#281F9A

secondary

#B9C154

accent

#E93EDD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281F9A

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

Preview Lab → · Contrast checker → · Palette generator →