#281F8D#281F8D

#281F8D is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.0% C 0.171 H 275.9°. Best body text is #FFFFFF at 12.57:1 contrast (WCAG AA passes).

Color values

HEX	#281F8D
RGB	rgb(40, 31, 141)
HSL	hsl(245, 64%, 34%)
HSV	hsv(245, 78%, 55%)
CMYK	cmyk(71.6%, 78%, 0%, 44.7%)
CIE-LAB	lab(21.41, 39.72, -58.81)
CIE-LCH	lch(21.41, 70.97, 304.04°)
OKLab	oklab(33.98% 0.0175 -0.17)
OKLCH	oklch(33.98% 0.171 275.9)
XYZ	xyz(6.1712, 3.3536, 25.5162)
Luminance	0.0335 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8D #848D1F

analogous

#1F4D8D #281F8D #5F1F8D

triadic

#281F8D #8D281F #1F8D28

tetradic

#281F8D #8D1F4D #848D1F #1F8D5F

square

#281F8D #8D1F4D #848D1F #1F8D5F

split-complementary

#281F8D #8D5F1F #4D8D1F

monochromatic

#0C0929 #1A145B #281F8D #362ABF #5A4ED8

Accessibility & contrast

On white

12.57

#281F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#281F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8D

12.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8D	#FFFFFF	#000000	##FFFFFF
##281F8D	1.00	12.57	1.67	12.57
#FFFFFF	12.57	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003890

Deuteranopia (green-blind)

#002E8B

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #281f8d;
/* rgb */ color: rgb(40, 31, 141);
/* oklch */ color: oklch(34.0% 0.171 275.9);

Tailwind

colors: {
  custom: {
    50: '#725db0',
    500: '#281f8d',
    950: '#000000',
  },
}

SCSS

$custom: #281f8d;
$custom-light: #725db0;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8d",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 244.909,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.33978,
    "c": 0.17091,
    "h": 275.9
  },
  "luminance": 0.03354
}

Semantic roles & 50–950 ramp

primary

#281F8D

secondary

#B2BB4D

accent

#E741D9

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090411

muted

#7B7980

Preview Lab

Preview with #281F8D

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

Preview Lab → · Contrast checker → · Palette generator →