#281B78#281B78

#281B78 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.1% C 0.148 H 279.7°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#281B78
RGB	rgb(40, 27, 120)
HSL	hsl(248, 63%, 29%)
HSV	hsv(248, 78%, 47%)
CMYK	cmyk(66.7%, 77.5%, 0%, 52.9%)
CIE-LAB	lab(18.32, 35.00, -50.63)
CIE-LCH	lch(18.32, 61.55, 304.66°)
OKLab	oklab(31.12% 0.025 -0.1461)
OKLCH	oklch(31.12% 0.148 279.7)
XYZ	xyz(4.6561, 2.5907, 18.0203)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B78 #6B781B

analogous

#1B3D78 #281B78 #571B78

triadic

#281B78 #78281B #1B7828

tetradic

#281B78 #781B3D #6B781B #1B7857

square

#281B78 #781B3D #6B781B #1B7857

split-complementary

#281B78 #78571B #3D781B

monochromatic

#080619 #171046 #281B78 #3926AA #503BD3

Accessibility & contrast

On white

13.83

#281B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#281B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B78

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B78	#FFFFFF	#000000	##FFFFFF
##281B78	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307B

Deuteranopia (green-blind)

#002976

Tritanopia (blue-blind)

#003648

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #281b78;
/* rgb */ color: rgb(40, 27, 120);
/* oklch */ color: oklch(31.1% 0.148 279.7);

Tailwind

colors: {
  custom: {
    50: '#6e59a0',
    500: '#281b78',
    950: '#000000',
  },
}

SCSS

$custom: #281b78;
$custom-light: #6e59a0;
$custom-dark: #000000;

JSON

{
  "hex": "#281b78",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 120
  },
  "hsl": {
    "h": 248.387,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.31121,
    "c": 0.14826,
    "h": 279.7
  },
  "luminance": 0.02591
}

Semantic roles & 50–950 ramp

primary

#281B78

secondary

#9DAC43

accent

#E641CF

background

#F7F5FA

surface

#EDE9F3

border

#C8C5CD

text

#08040F

muted

#7B797F

Preview Lab

Preview with #281B78

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

Preview Lab → · Contrast checker → · Palette generator →