#281FAB#281FAB

#281FAB is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.4% C 0.207 H 272.8°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#281FAB
RGB	rgb(40, 31, 171)
HSL	hsl(244, 69%, 40%)
HSV	hsv(244, 82%, 67%)
CMYK	cmyk(76.6%, 81.9%, 0%, 32.9%)
CIE-LAB	lab(24.86, 49.33, -71.47)
CIE-LCH	lch(24.86, 86.84, 304.61°)
OKLab	oklab(37.4% 0.0101 -0.2068)
OKLCH	oklch(37.4% 0.207 272.8)
XYZ	xyz(8.7133, 4.3704, 38.9045)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281FAB #A2AB1F

analogous

#1F5CAB #281FAB #6E1FAB

triadic

#281FAB #AB281F #1FAB28

tetradic

#281FAB #AB1F5C #A2AB1F #1FAB6E

square

#281FAB #AB1F5C #A2AB1F #1FAB6E

split-complementary

#281FAB #AB6E1F #5CAB1F

monochromatic

#100C43 #1C1677 #281FAB #392ED9 #6A62E3

Accessibility & contrast

On white

11.20

#281FAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#281FAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281FAB

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281FAB	#FFFFFF	#000000	##FFFFFF
##281FAB	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041AF

Deuteranopia (green-blind)

#0034A9

Tritanopia (blue-blind)

#004B66

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #281fab;
/* rgb */ color: rgb(40, 31, 171);
/* oklch */ color: oklch(37.4% 0.207 272.8);

Tailwind

colors: {
  custom: {
    50: '#7a5fc5',
    500: '#281fab',
    950: '#000000',
  },
}

SCSS

$custom: #281fab;
$custom-light: #7a5fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#281fab",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 171
  },
  "hsl": {
    "h": 243.857,
    "s": 69.307,
    "l": 39.608
  },
  "oklch": {
    "l": 0.37397,
    "c": 0.20703,
    "h": 272.8
  },
  "luminance": 0.04371
}

Semantic roles & 50–950 ramp

primary

#281FAB

secondary

#C1C75E

accent

#EC3CE1

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #281FAB

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

Preview Lab → · Contrast checker → · Palette generator →