#281DA1#281DA1

#281DA1 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.0% C 0.197 H 273.9°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#281DA1
RGB	rgb(40, 29, 161)
HSL	hsl(245, 69%, 37%)
HSV	hsv(245, 82%, 63%)
CMYK	cmyk(75.2%, 82%, 0%, 36.9%)
CIE-LAB	lab(23.35, 47.18, -67.92)
CIE-LCH	lch(23.35, 82.70, 304.78°)
OKLab	oklab(36% 0.0133 -0.1965)
OKLCH	oklch(36% 0.197 273.9)
XYZ	xyz(7.7453, 3.9023, 34.0563)
Luminance	0.0390 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281DA1 #96A11D

analogous

#1D54A1 #281DA1 #6A1DA1

triadic

#281DA1 #A1281D #1DA128

tetradic

#281DA1 #A11D54 #96A11D #1DA16A

square

#281DA1 #A11D54 #96A11D #1DA16A

split-complementary

#281DA1 #A16A1D #54A11D

monochromatic

#0E0A39 #1B146D #281DA1 #3526D5 #6358E1

Accessibility & contrast

On white

11.79

#281DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#281DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281DA1

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281DA1	#FFFFFF	#000000	##FFFFFF
##281DA1	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00319F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #281da1;
/* rgb */ color: rgb(40, 29, 161);
/* oklch */ color: oklch(36.0% 0.197 273.9);

Tailwind

colors: {
  custom: {
    50: '#775dbe',
    500: '#281da1',
    950: '#000000',
  },
}

SCSS

$custom: #281da1;
$custom-light: #775dbe;
$custom-dark: #000000;

JSON

{
  "hex": "#281da1",
  "rgb": {
    "r": 40,
    "g": 29,
    "b": 161
  },
  "hsl": {
    "h": 245,
    "s": 69.474,
    "l": 37.255
  },
  "oklch": {
    "l": 0.36003,
    "c": 0.19691,
    "h": 273.9
  },
  "luminance": 0.03903
}

Semantic roles & 50–950 ramp

primary

#281DA1

secondary

#BBC455

accent

#EC3CDE

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281DA1

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

Preview Lab → · Contrast checker → · Palette generator →