#281B9F#281B9F

#281B9F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.5% C 0.196 H 274.2°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#281B9F
RGB	rgb(40, 27, 159)
HSL	hsl(246, 71%, 36%)
HSV	hsv(246, 83%, 62%)
CMYK	cmyk(74.8%, 83%, 0%, 37.6%)
CIE-LAB	lab(22.78, 47.51, -67.64)
CIE-LCH	lch(22.78, 82.65, 305.08°)
OKLab	oklab(35.55% 0.0145 -0.1956)
OKLCH	oklch(35.55% 0.196 274.2)
XYZ	xyz(7.5229, 3.7374, 33.1191)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B9F #929F1B

analogous

#1B509F #281B9F #6A1B9F

triadic

#281B9F #9F281B #1B9F28

tetradic

#281B9F #9F1B50 #929F1B #1B9F6A

square

#281B9F #9F1B50 #929F1B #1B9F6A

split-complementary

#281B9F #9F6A1B #509F1B

monochromatic

#0E0936 #1B126B #281B9F #3524D3 #6153E2

Accessibility & contrast

On white

12.02

#281B9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#281B9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B9F

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B9F	#FFFFFF	#000000	##FFFFFF
##281B9F	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA3

Deuteranopia (green-blind)

#00309D

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #281b9f;
/* rgb */ color: rgb(40, 27, 159);
/* oklch */ color: oklch(35.5% 0.196 274.2);

Tailwind

colors: {
  custom: {
    50: '#775cbd',
    500: '#281b9f',
    950: '#000000',
  },
}

SCSS

$custom: #281b9f;
$custom-light: #775cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#281b9f",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 159
  },
  "hsl": {
    "h": 245.909,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.35545,
    "c": 0.19613,
    "h": 274.2
  },
  "luminance": 0.03738
}

Semantic roles & 50–950 ramp

primary

#281B9F

secondary

#B9C551

accent

#EE3ADC

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281B9F

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

Preview Lab → · Contrast checker → · Palette generator →