#281BB3#281BB3

#281BB3 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.9% C 0.219 H 272.4°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#281BB3
RGB	rgb(40, 27, 179)
HSL	hsl(245, 74%, 40%)
HSV	hsv(245, 85%, 70%)
CMYK	cmyk(77.7%, 84.9%, 0%, 29.8%)
CIE-LAB	lab(25.23, 53.54, -75.67)
CIE-LCH	lch(25.23, 92.69, 305.28°)
OKLab	oklab(37.93% 0.0091 -0.2188)
OKLCH	oklch(37.93% 0.219 272.4)
XYZ	xyz(9.4010, 4.4886, 43.0100)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281BB3 #A6B31B

analogous

#1B5AB3 #281BB3 #741BB3

triadic

#281BB3 #B3281B #1BB328

tetradic

#281BB3 #B31B5A #A6B31B #1BB374

square

#281BB3 #B31B5A #A6B31B #1BB374

split-complementary

#281BB3 #B3741B #5AB31B

monochromatic

#100B49 #1C137E #281BB3 #3B2CDF #6D61E7

Accessibility & contrast

On white

11.06

#281BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#281BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281BB3

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281BB3	#FFFFFF	#000000	##FFFFFF
##281BB3	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004D6A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #281bb3;
/* rgb */ color: rgb(40, 27, 179);
/* oklch */ color: oklch(37.9% 0.219 272.4);

Tailwind

colors: {
  custom: {
    50: '#7c5ecb',
    500: '#281bb3',
    950: '#000000',
  },
}

SCSS

$custom: #281bb3;
$custom-light: #7c5ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#281bb3",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 179
  },
  "hsl": {
    "h": 245.132,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37928,
    "c": 0.21904,
    "h": 272.4
  },
  "luminance": 0.0449
}

Semantic roles & 50–950 ramp

primary

#281BB3

secondary

#C2CC5E

accent

#F037E1

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #281BB3

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

Preview Lab → · Contrast checker → · Palette generator →