#281F9D#281F9D

#281F9D is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.8% C 0.191 H 274.1°. Best body text is #FFFFFF at 11.84:1 contrast (WCAG AA passes).

Color values

HEX	#281F9D
RGB	rgb(40, 31, 157)
HSL	hsl(244, 67%, 37%)
HSV	hsv(244, 80%, 62%)
CMYK	cmyk(74.5%, 80.3%, 0%, 38.4%)
CIE-LAB	lab(23.22, 44.92, -65.69)
CIE-LCH	lch(23.22, 79.58, 304.37°)
OKLab	oklab(35.78% 0.0136 -0.19)
OKLCH	oklch(35.78% 0.191 274.1)
XYZ	xyz(7.4488, 3.8647, 32.2451)
Luminance	0.0386 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F9D #949D1F

analogous

#1F559D #281F9D #671F9D

triadic

#281F9D #9D281F #1F9D28

tetradic

#281F9D #9D1F55 #949D1F #1F9D67

square

#281F9D #9D1F55 #949D1F #1F9D67

split-complementary

#281F9D #9D671F #559D1F

monochromatic

#0E0B37 #1B156A #281F9D #3529D0 #6258DE

Accessibility & contrast

On white

11.84

#281F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#281F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F9D

11.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F9D	#FFFFFF	#000000	##FFFFFF
##281F9D	1.00	11.84	1.77	11.84
#FFFFFF	11.84	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA0

Deuteranopia (green-blind)

#00319B

Tritanopia (blue-blind)

#00465E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #281f9d;
/* rgb */ color: rgb(40, 31, 157);
/* oklch */ color: oklch(35.8% 0.191 274.1);

Tailwind

colors: {
  custom: {
    50: '#765ebb',
    500: '#281f9d',
    950: '#000000',
  },
}

SCSS

$custom: #281f9d;
$custom-light: #765ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#281f9d",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 157
  },
  "hsl": {
    "h": 244.286,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.35779,
    "c": 0.19051,
    "h": 274.1
  },
  "luminance": 0.03865
}

Semantic roles & 50–950 ramp

primary

#281F9D

secondary

#BAC256

accent

#EA3EDE

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281F9D

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

Preview Lab → · Contrast checker → · Palette generator →