#281B79#281B79

#281B79 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.2% C 0.150 H 279.5°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#281B79
RGB	rgb(40, 27, 121)
HSL	hsl(248, 64%, 29%)
HSV	hsv(248, 78%, 47%)
CMYK	cmyk(66.9%, 77.7%, 0%, 52.5%)
CIE-LAB	lab(18.43, 35.33, -51.09)
CIE-LCH	lch(18.43, 62.12, 304.67°)
OKLab	oklab(31.23% 0.0248 -0.1475)
OKLCH	oklch(31.23% 0.15 279.5)
XYZ	xyz(4.7171, 2.6151, 18.3416)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B79 #6C791B

analogous

#1B3D79 #281B79 #571B79

triadic

#281B79 #79281B #1B7928

tetradic

#281B79 #791B3D #6C791B #1B7957

square

#281B79 #791B3D #6C791B #1B7957

split-complementary

#281B79 #79571B #3D791B

monochromatic

#080619 #171047 #281B79 #3926AB #503BD3

Accessibility & contrast

On white

13.79

#281B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#281B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B79

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B79	#FFFFFF	#000000	##FFFFFF
##281B79	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307C

Deuteranopia (green-blind)

#002977

Tritanopia (blue-blind)

#003649

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #281b79;
/* rgb */ color: rgb(40, 27, 121);
/* oklch */ color: oklch(31.2% 0.150 279.5);

Tailwind

colors: {
  custom: {
    50: '#6e59a1',
    500: '#281b79',
    950: '#000000',
  },
}

SCSS

$custom: #281b79;
$custom-light: #6e59a1;
$custom-dark: #000000;

JSON

{
  "hex": "#281b79",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 121
  },
  "hsl": {
    "h": 248.298,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.3123,
    "c": 0.14955,
    "h": 279.5
  },
  "luminance": 0.02615
}

Semantic roles & 50–950 ramp

primary

#281B79

secondary

#9EAD43

accent

#E741D0

background

#F7F5FA

surface

#EDE9F3

border

#C8C5CD

text

#08040F

muted

#7B797F

Preview Lab

Preview with #281B79

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

Preview Lab → · Contrast checker → · Palette generator →