#281B90#281B90

#281B90 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.8% C 0.178 H 276.0°. Best body text is #FFFFFF at 12.73:1 contrast (WCAG AA passes).

Color values

HEX	#281B90
RGB	rgb(40, 27, 144)
HSL	hsl(247, 68%, 34%)
HSV	hsv(247, 81%, 56%)
CMYK	cmyk(72.2%, 81.3%, 0%, 43.5%)
CIE-LAB	lab(21.01, 42.81, -61.33)
CIE-LCH	lch(21.01, 74.80, 304.92°)
OKLab	oklab(33.8% 0.0187 -0.1773)
OKLCH	oklch(33.8% 0.178 276)
XYZ	xyz(6.2994, 3.2480, 26.6751)
Luminance	0.0325 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B90 #83901B

analogous

#1B4890 #281B90 #621B90

triadic

#281B90 #90281B #1B9028

tetradic

#281B90 #901B48 #83901B #1B9062

square

#281B90 #901B48 #83901B #1B9062

split-complementary

#281B90 #90621B #48901B

monochromatic

#0B0829 #1A115C #281B90 #3625C4 #5949DD

Accessibility & contrast

On white

12.73

#281B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#281B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B90

12.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B90	#FFFFFF	#000000	##FFFFFF
##281B90	1.00	12.73	1.65	12.73
#FFFFFF	12.73	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003793

Deuteranopia (green-blind)

#002D8E

Tritanopia (blue-blind)

#003F56

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #281b90;
/* rgb */ color: rgb(40, 27, 144);
/* oklch */ color: oklch(33.8% 0.178 276.0);

Tailwind

colors: {
  custom: {
    50: '#735bb2',
    500: '#281b90',
    950: '#000000',
  },
}

SCSS

$custom: #281b90;
$custom-light: #735bb2;
$custom-dark: #000000;

JSON

{
  "hex": "#281b90",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 144
  },
  "hsl": {
    "h": 246.667,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.338,
    "c": 0.17828,
    "h": 276
  },
  "luminance": 0.03249
}

Semantic roles & 50–950 ramp

primary

#281B90

secondary

#B1BF48

accent

#EB3DD8

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281B90

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

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