#281CB0#281CB0

#281CB0 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.7% C 0.215 H 272.6°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#281CB0
RGB	rgb(40, 28, 176)
HSL	hsl(245, 73%, 40%)
HSV	hsv(245, 84%, 69%)
CMYK	cmyk(77.3%, 84.1%, 0%, 31%)
CIE-LAB	lab(25.00, 52.22, -74.25)
CIE-LCH	lch(25.00, 90.77, 305.12°)
OKLab	oklab(37.67% 0.0097 -0.2148)
OKLCH	oklch(37.67% 0.215 272.6)
XYZ	xyz(9.1242, 4.4152, 41.4372)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281CB0 #A4B01C

analogous

#1C5AB0 #281CB0 #721CB0

triadic

#281CB0 #B0281C #1CB028

tetradic

#281CB0 #B01C5A #A4B01C #1CB072

square

#281CB0 #B01C5A #A4B01C #1CB072

split-complementary

#281CB0 #B0721C #5AB01C

monochromatic

#100B46 #1C147B #281CB0 #3A2CDD #6B61E6

Accessibility & contrast

On white

11.15

#281CB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#281CB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281CB0

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281CB0	#FFFFFF	#000000	##FFFFFF
##281CB0	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B4

Deuteranopia (green-blind)

#0034AE

Tritanopia (blue-blind)

#004C69

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #281cb0;
/* rgb */ color: rgb(40, 28, 176);
/* oklch */ color: oklch(37.7% 0.215 272.6);

Tailwind

colors: {
  custom: {
    50: '#7b5ec9',
    500: '#281cb0',
    950: '#000000',
  },
}

SCSS

$custom: #281cb0;
$custom-light: #7b5ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#281cb0",
  "rgb": {
    "r": 40,
    "g": 28,
    "b": 176
  },
  "hsl": {
    "h": 244.865,
    "s": 72.549,
    "l": 40
  },
  "oklch": {
    "l": 0.37667,
    "c": 0.21498,
    "h": 272.6
  },
  "luminance": 0.04416
}

Semantic roles & 50–950 ramp

primary

#281CB0

secondary

#C1CA5E

accent

#EF39E0

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #281CB0

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

Preview Lab → · Contrast checker → · Palette generator →