#281F8B#281F8B

#281F8B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.8% C 0.168 H 276.1°. Best body text is #FFFFFF at 12.66:1 contrast (WCAG AA passes).

Color values

HEX	#281F8B
RGB	rgb(40, 31, 139)
HSL	hsl(245, 64%, 33%)
HSV	hsv(245, 78%, 55%)
CMYK	cmyk(71.2%, 77.7%, 0%, 45.5%)
CIE-LAB	lab(21.19, 39.06, -57.93)
CIE-LCH	lch(21.19, 69.86, 303.99°)
OKLab	oklab(33.76% 0.018 -0.1674)
OKLCH	oklch(33.76% 0.168 276.1)
XYZ	xyz(6.0237, 3.2946, 24.7396)
Luminance	0.0330 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8B #828B1F

analogous

#1F4C8B #281F8B #5E1F8B

triadic

#281F8B #8B281F #1F8B28

tetradic

#281F8B #8B1F4C #828B1F #1F8B5E

square

#281F8B #8B1F4C #828B1F #1F8B5E

split-complementary

#281F8B #8B5E1F #4C8B1F

monochromatic

#0B0927 #1A1459 #281F8B #362ABD #594DD7

Accessibility & contrast

On white

12.66

#281F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#281F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8B

12.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8B	#FFFFFF	#000000	##FFFFFF
##281F8B	1.00	12.66	1.66	12.66
#FFFFFF	12.66	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378E

Deuteranopia (green-blind)

#002E89

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #281f8b;
/* rgb */ color: rgb(40, 31, 139);
/* oklch */ color: oklch(33.8% 0.168 276.1);

Tailwind

colors: {
  custom: {
    50: '#725dae',
    500: '#281f8b',
    950: '#000000',
  },
}

SCSS

$custom: #281f8b;
$custom-light: #725dae;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8b",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 139
  },
  "hsl": {
    "h": 245,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33757,
    "c": 0.1684,
    "h": 276.1
  },
  "luminance": 0.03295
}

Semantic roles & 50–950 ramp

primary

#281F8B

secondary

#B1BA4C

accent

#E741D9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #281F8B

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

Preview Lab → · Contrast checker → · Palette generator →