#281F9F#281F9F

#281F9F is a dark, vivid blue. Relative luminance 0.039; OKLCH L 36.0% C 0.193 H 273.9°. Best body text is #FFFFFF at 11.75:1 contrast (WCAG AA passes).

Color values

HEX	#281F9F
RGB	rgb(40, 31, 159)
HSL	hsl(244, 67%, 37%)
HSV	hsv(244, 81%, 62%)
CMYK	cmyk(74.8%, 80.5%, 0%, 37.6%)
CIE-LAB	lab(23.45, 45.56, -66.53)
CIE-LCH	lch(23.45, 80.64, 304.40°)
OKLab	oklab(36.01% 0.0131 -0.1924)
OKLCH	oklch(36.01% 0.193 273.9)
XYZ	xyz(7.6210, 3.9335, 33.1518)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F9F #969F1F

analogous

#1F569F #281F9F #681F9F

triadic

#281F9F #9F281F #1F9F28

tetradic

#281F9F #9F1F56 #969F1F #1F9F68

square

#281F9F #9F1F56 #969F1F #1F9F68

split-complementary

#281F9F #9F681F #569F1F

monochromatic

#0E0B39 #1B156C #281F9F #3529D2 #635ADF

Accessibility & contrast

On white

11.75

#281F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#281F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F9F

11.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F9F	#FFFFFF	#000000	##FFFFFF
##281F9F	1.00	11.75	1.79	11.75
#FFFFFF	11.75	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA3

Deuteranopia (green-blind)

#00329D

Tritanopia (blue-blind)

#00475F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #281f9f;
/* rgb */ color: rgb(40, 31, 159);
/* oklch */ color: oklch(36.0% 0.193 273.9);

Tailwind

colors: {
  custom: {
    50: '#775ebd',
    500: '#281f9f',
    950: '#000000',
  },
}

SCSS

$custom: #281f9f;
$custom-light: #775ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#281f9f",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 159
  },
  "hsl": {
    "h": 244.219,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.36008,
    "c": 0.1929,
    "h": 273.9
  },
  "luminance": 0.03934
}

Semantic roles & 50–950 ramp

primary

#281F9F

secondary

#BBC357

accent

#EA3EDE

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #281F9F

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

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