#281F71#281F71

#281F71 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.134 H 280.1°. Best body text is #FFFFFF at 13.77:1 contrast (WCAG AA passes).

Color values

HEX	#281F71
RGB	rgb(40, 31, 113)
HSL	hsl(247, 57%, 28%)
HSV	hsv(247, 73%, 44%)
CMYK	cmyk(64.6%, 72.6%, 0%, 55.7%)
CIE-LAB	lab(18.47, 30.22, -45.89)
CIE-LCH	lch(18.47, 54.94, 303.36°)
OKLab	oklab(31% 0.0235 -0.1323)
OKLCH	oklch(31% 0.134 280.1)
XYZ	xyz(4.3447, 2.6230, 15.8969)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F71 #68711F

analogous

#1F3F71 #281F71 #511F71

triadic

#281F71 #71281F #1F7128

tetradic

#281F71 #711F3F #68711F #1F7151

square

#281F71 #711F3F #68711F #1F7151

split-complementary

#281F71 #71511F #3F711F

monochromatic

#080718 #171241 #281F71 #392CA1 #4F40CB

Accessibility & contrast

On white

13.77

#281F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#281F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F71

13.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F71	#FFFFFF	#000000	##FFFFFF
##281F71	1.00	13.77	1.52	13.77
#FFFFFF	13.77	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003073

Deuteranopia (green-blind)

#002A6F

Tritanopia (blue-blind)

#003545

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #281f71;
/* rgb */ color: rgb(40, 31, 113);
/* oklch */ color: oklch(31.0% 0.134 280.1);

Tailwind

colors: {
  custom: {
    50: '#6c5c9b',
    500: '#281f71',
    950: '#000000',
  },
}

SCSS

$custom: #281f71;
$custom-light: #6c5c9b;
$custom-dark: #000000;

JSON

{
  "hex": "#281f71",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 113
  },
  "hsl": {
    "h": 246.585,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31004,
    "c": 0.13436,
    "h": 280.1
  },
  "luminance": 0.02623
}

Semantic roles & 50–950 ramp

primary

#281F71

secondary

#9BA547

accent

#E048CF

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #281F71

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

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