#281F57#281F57

#281F57 is a dark, moderate blue. Relative luminance 0.021; OKLCH L 28.6% C 0.097 H 285.8°. Best body text is #FFFFFF at 14.75:1 contrast (WCAG AA passes).

Color values

HEX	#281F57
RGB	rgb(40, 31, 87)
HSL	hsl(250, 47%, 23%)
HSV	hsv(250, 64%, 34%)
CMYK	cmyk(54%, 64.4%, 0%, 65.9%)
CIE-LAB	lab(16.10, 21.13, -32.61)
CIE-LCH	lch(16.10, 38.86, 302.94°)
OKLab	oklab(28.55% 0.0265 -0.0933)
OKLCH	oklch(28.55% 0.097 285.8)
XYZ	xyz(3.0848, 2.1191, 9.2615)
Luminance	0.0212 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F57 #4E571F

analogous

#1F3257 #281F57 #441F57

triadic

#281F57 #57281F #1F5728

tetradic

#281F57 #571F32 #4E571F #1F5744

square

#281F57 #571F32 #4E571F #1F5744

split-complementary

#281F57 #57441F #32571F

monochromatic

#0A0817 #130F2A #281F57 #3D2F84 #513FB1

Accessibility & contrast

On white

14.75

#281F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#281F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F57

14.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F57	#FFFFFF	#000000	##FFFFFF
##281F57	1.00	14.75	1.42	14.75
#FFFFFF	14.75	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002959

Deuteranopia (green-blind)

#002656

Tritanopia (blue-blind)

#172C37

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #281f57;
/* rgb */ color: rgb(40, 31, 87);
/* oklch */ color: oklch(28.6% 0.097 285.8);

Tailwind

colors: {
  custom: {
    50: '#675b87',
    500: '#281f57',
    950: '#000000',
  },
}

SCSS

$custom: #281f57;
$custom-light: #675b87;
$custom-dark: #000000;

JSON

{
  "hex": "#281f57",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 87
  },
  "hsl": {
    "h": 249.643,
    "s": 47.458,
    "l": 23.137
  },
  "oklch": {
    "l": 0.28552,
    "c": 0.097,
    "h": 285.8
  },
  "luminance": 0.02119
}

Semantic roles & 50–950 ramp

primary

#281F57

secondary

#818C46

accent

#D751C1

background

#F6F5F8

surface

#EBE9EF

border

#C6C5CA

text

#06040B

muted

#7A797C

Preview Lab

Preview with #281F57

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

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