#281F8F#281F8F

#281F8F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.2% C 0.173 H 275.6°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#281F8F
RGB	rgb(40, 31, 143)
HSL	hsl(245, 64%, 34%)
HSV	hsv(245, 78%, 56%)
CMYK	cmyk(72%, 78.3%, 0%, 43.9%)
CIE-LAB	lab(21.63, 40.38, -59.69)
CIE-LCH	lch(21.63, 72.06, 304.08°)
OKLab	oklab(34.2% 0.017 -0.1726)
OKLCH	oklch(34.2% 0.173 275.6)
XYZ	xyz(6.3214, 3.4137, 26.3070)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8F #868F1F

analogous

#1F4E8F #281F8F #601F8F

triadic

#281F8F #8F281F #1F8F28

tetradic

#281F8F #8F1F4E #868F1F #1F8F60

square

#281F8F #8F1F4E #868F1F #1F8F60

split-complementary

#281F8F #8F601F #4E8F1F

monochromatic

#0C092A #1A145D #281F8F #362AC1 #5B4FD9

Accessibility & contrast

On white

12.48

#281F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#281F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8F

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8F	#FFFFFF	#000000	##FFFFFF
##281F8F	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003992

Deuteranopia (green-blind)

#002F8D

Tritanopia (blue-blind)

#004056

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #281f8f;
/* rgb */ color: rgb(40, 31, 143);
/* oklch */ color: oklch(34.2% 0.173 275.6);

Tailwind

colors: {
  custom: {
    50: '#735db1',
    500: '#281f8f',
    950: '#000000',
  },
}

SCSS

$custom: #281f8f;
$custom-light: #735db1;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8f",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 143
  },
  "hsl": {
    "h": 244.821,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.34199,
    "c": 0.17341,
    "h": 275.6
  },
  "luminance": 0.03414
}

Semantic roles & 50–950 ramp

primary

#281F8F

secondary

#B3BC4E

accent

#E740DA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281F8F

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

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