#281D9B#281D9B

#281D9B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.3% C 0.190 H 274.5°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#281D9B
RGB	rgb(40, 29, 155)
HSL	hsl(245, 68%, 36%)
HSV	hsv(245, 81%, 61%)
CMYK	cmyk(74.2%, 81.3%, 0%, 39.2%)
CIE-LAB	lab(22.64, 45.30, -65.43)
CIE-LCH	lch(22.64, 79.58, 304.70°)
OKLab	oklab(35.31% 0.0149 -0.1892)
OKLCH	oklch(35.31% 0.19 274.5)
XYZ	xyz(7.2289, 3.6957, 31.3364)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281D9B #909B1D

analogous

#1D519B #281D9B #671D9B

triadic

#281D9B #9B281D #1D9B28

tetradic

#281D9B #9B1D51 #909B1D #1D9B67

square

#281D9B #9B1D51 #909B1D #1D9B67

split-complementary

#281D9B #9B671D #519B1D

monochromatic

#0D0A34 #1B1367 #281D9B #3527CF #6053DF

Accessibility & contrast

On white

12.07

#281D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#281D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281D9B

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281D9B	#FFFFFF	#000000	##FFFFFF
##281D9B	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C9E

Deuteranopia (green-blind)

#003099

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #281d9b;
/* rgb */ color: rgb(40, 29, 155);
/* oklch */ color: oklch(35.3% 0.190 274.5);

Tailwind

colors: {
  custom: {
    50: '#765dba',
    500: '#281d9b',
    950: '#000000',
  },
}

SCSS

$custom: #281d9b;
$custom-light: #765dba;
$custom-dark: #000000;

JSON

{
  "hex": "#281d9b",
  "rgb": {
    "r": 40,
    "g": 29,
    "b": 155
  },
  "hsl": {
    "h": 245.238,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.35307,
    "c": 0.1898,
    "h": 274.5
  },
  "luminance": 0.03696
}

Semantic roles & 50–950 ramp

primary

#281D9B

secondary

#B8C252

accent

#EB3CDC

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281D9B

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

Preview Lab → · Contrast checker → · Palette generator →