#281B75#281B75

#281B75 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.8% C 0.144 H 280.3°. Best body text is #FFFFFF at 13.96:1 contrast (WCAG AA passes).

Color values

HEX	#281B75
RGB	rgb(40, 27, 117)
HSL	hsl(249, 63%, 28%)
HSV	hsv(249, 77%, 46%)
CMYK	cmyk(65.8%, 76.9%, 0%, 54.1%)
CIE-LAB	lab(18.00, 34.00, -49.23)
CIE-LCH	lch(18.00, 59.83, 304.63°)
OKLab	oklab(30.8% 0.0258 -0.142)
OKLCH	oklch(30.8% 0.144 280.3)
XYZ	xyz(4.4769, 2.5190, 17.0765)
Luminance	0.0252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B75 #68751B

analogous

#1B3B75 #281B75 #551B75

triadic

#281B75 #75281B #1B7528

tetradic

#281B75 #751B3B #68751B #1B7555

square

#281B75 #751B3B #68751B #1B7555

split-complementary

#281B75 #75551B #3B751B

monochromatic

#090619 #171043 #281B75 #3926A7 #4F39D1

Accessibility & contrast

On white

13.96

#281B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#281B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B75

13.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B75	#FFFFFF	#000000	##FFFFFF
##281B75	1.00	13.96	1.50	13.96
#FFFFFF	13.96	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F78

Deuteranopia (green-blind)

#002973

Tritanopia (blue-blind)

#003446

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #281b75;
/* rgb */ color: rgb(40, 27, 117);
/* oklch */ color: oklch(30.8% 0.144 280.3);

Tailwind

colors: {
  custom: {
    50: '#6d599e',
    500: '#281b75',
    950: '#000000',
  },
}

SCSS

$custom: #281b75;
$custom-light: #6d599e;
$custom-dark: #000000;

JSON

{
  "hex": "#281b75",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 117
  },
  "hsl": {
    "h": 248.667,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.308,
    "c": 0.14436,
    "h": 280.3
  },
  "luminance": 0.02519
}

Semantic roles & 50–950 ramp

primary

#281B75

secondary

#9BA942

accent

#E642CE

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040E

muted

#7B797E

Preview Lab

Preview with #281B75

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

Preview Lab → · Contrast checker → · Palette generator →