#281BB1#281BB1

#281BB1 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.7% C 0.217 H 272.5°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#281BB1
RGB	rgb(40, 27, 177)
HSL	hsl(245, 74%, 40%)
HSV	hsv(245, 85%, 69%)
CMYK	cmyk(77.4%, 84.7%, 0%, 30.6%)
CIE-LAB	lab(24.98, 52.95, -74.88)
CIE-LCH	lch(24.98, 91.71, 305.26°)
OKLab	oklab(37.69% 0.0096 -0.2166)
OKLCH	oklch(37.69% 0.217 272.5)
XYZ	xyz(9.2002, 4.4083, 41.9525)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281BB1 #A4B11B

analogous

#1B59B1 #281BB1 #731BB1

triadic

#281BB1 #B1281B #1BB128

tetradic

#281BB1 #B11B59 #A4B11B #1BB173

square

#281BB1 #B11B59 #A4B11B #1BB173

split-complementary

#281BB1 #B1731B #59B11B

monochromatic

#100B47 #1C137C #281BB1 #3A2BDF #6B60E7

Accessibility & contrast

On white

11.16

#281BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#281BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281BB1

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281BB1	#FFFFFF	#000000	##FFFFFF
##281BB1	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B5

Deuteranopia (green-blind)

#0034AF

Tritanopia (blue-blind)

#004D69

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #281bb1;
/* rgb */ color: rgb(40, 27, 177);
/* oklch */ color: oklch(37.7% 0.217 272.5);

Tailwind

colors: {
  custom: {
    50: '#7b5dca',
    500: '#281bb1',
    950: '#000000',
  },
}

SCSS

$custom: #281bb1;
$custom-light: #7b5dca;
$custom-dark: #000000;

JSON

{
  "hex": "#281bb1",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 177
  },
  "hsl": {
    "h": 245.2,
    "s": 73.529,
    "l": 40
  },
  "oklch": {
    "l": 0.37687,
    "c": 0.21679,
    "h": 272.5
  },
  "luminance": 0.04409
}

Semantic roles & 50–950 ramp

primary

#281BB1

secondary

#C1CB5D

accent

#F038E0

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #281BB1

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

Preview Lab → · Contrast checker → · Palette generator →