#281A8B#281A8B

#281A8B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.173 H 276.8°. Best body text is #FFFFFF at 13.04:1 contrast (WCAG AA passes).

Color values

HEX	#281A8B
RGB	rgb(40, 26, 139)
HSL	hsl(247, 68%, 32%)
HSV	hsv(247, 81%, 55%)
CMYK	cmyk(71.2%, 81.3%, 0%, 45.5%)
CIE-LAB	lab(20.26, 41.73, -59.46)
CIE-LCH	lch(20.26, 72.65, 305.06°)
OKLab	oklab(33.11% 0.0205 -0.1718)
OKLCH	oklch(33.11% 0.173 276.8)
XYZ	xyz(5.9031, 3.0534, 24.6994)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281A8B #7D8B1A

analogous

#1A448B #281A8B #611A8B

triadic

#281A8B #8B281A #1A8B28

tetradic

#281A8B #8B1A44 #7D8B1A #1A8B61

square

#281A8B #8B1A44 #7D8B1A #1A8B61

split-complementary

#281A8B #8B611A #448B1A

monochromatic

#0A0724 #191057 #281A8B #3724BF #5643DC

Accessibility & contrast

On white

13.04

#281A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#281A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281A8B

13.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281A8B	#FFFFFF	#000000	##FFFFFF
##281A8B	1.00	13.04	1.61	13.04
#FFFFFF	13.04	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002C89

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #281a8b;
/* rgb */ color: rgb(40, 26, 139);
/* oklch */ color: oklch(33.1% 0.173 276.8);

Tailwind

colors: {
  custom: {
    50: '#725aae',
    500: '#281a8b',
    950: '#000000',
  },
}

SCSS

$custom: #281a8b;
$custom-light: #725aae;
$custom-dark: #000000;

JSON

{
  "hex": "#281a8b",
  "rgb": {
    "r": 40,
    "g": 26,
    "b": 139
  },
  "hsl": {
    "h": 247.434,
    "s": 68.485,
    "l": 32.353
  },
  "oklch": {
    "l": 0.33105,
    "c": 0.17307,
    "h": 276.8
  },
  "luminance": 0.03054
}

Semantic roles & 50–950 ramp

primary

#281A8B

secondary

#AEBD44

accent

#EB3CD6

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #281A8B

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

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