#281CB4#281CB4

#281CB4 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.1% C 0.220 H 272.3°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#281CB4
RGB	rgb(40, 28, 180)
HSL	hsl(245, 73%, 41%)
HSV	hsv(245, 84%, 71%)
CMYK	cmyk(77.8%, 84.4%, 0%, 29.4%)
CIE-LAB	lab(25.49, 53.41, -75.82)
CIE-LCH	lch(25.49, 92.75, 305.16°)
OKLab	oklab(38.15% 0.0086 -0.2193)
OKLCH	oklch(38.15% 0.22 272.3)
XYZ	xyz(9.5258, 4.5759, 43.5524)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281CB4 #A8B41C

analogous

#1C5CB4 #281CB4 #741CB4

triadic

#281CB4 #B4281C #1CB428

tetradic

#281CB4 #B41C5C #A8B41C #1CB474

square

#281CB4 #B41C5C #A8B41C #1CB474

split-complementary

#281CB4 #B4741C #5CB41C

monochromatic

#100C4A #1C147F #281CB4 #3D2FDF #6E64E7

Accessibility & contrast

On white

10.96

#281CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#281CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281CB4

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281CB4	#FFFFFF	#000000	##FFFFFF
##281CB4	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B8

Deuteranopia (green-blind)

#0035B2

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #281cb4;
/* rgb */ color: rgb(40, 28, 180);
/* oklch */ color: oklch(38.1% 0.220 272.3);

Tailwind

colors: {
  custom: {
    50: '#7c5ecc',
    500: '#281cb4',
    950: '#000000',
  },
}

SCSS

$custom: #281cb4;
$custom-light: #7c5ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#281cb4",
  "rgb": {
    "r": 40,
    "g": 28,
    "b": 180
  },
  "hsl": {
    "h": 244.737,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38145,
    "c": 0.2195,
    "h": 272.3
  },
  "luminance": 0.04577
}

Semantic roles & 50–950 ramp

primary

#281CB4

secondary

#C3CC60

accent

#F038E1

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #281CB4

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

Preview Lab → · Contrast checker → · Palette generator →