#281F8C#281F8C

#281F8C is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.9% C 0.170 H 276.0°. Best body text is #FFFFFF at 12.61:1 contrast (WCAG AA passes).

Color values

HEX	#281F8C
RGB	rgb(40, 31, 140)
HSL	hsl(245, 64%, 34%)
HSV	hsv(245, 78%, 55%)
CMYK	cmyk(71.4%, 77.9%, 0%, 45.1%)
CIE-LAB	lab(21.30, 39.39, -58.37)
CIE-LCH	lch(21.30, 70.42, 304.01°)
OKLab	oklab(33.87% 0.0177 -0.1687)
OKLCH	oklch(33.87% 0.17 276)
XYZ	xyz(6.0971, 3.3240, 25.1261)
Luminance	0.0333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8C #838C1F

analogous

#1F4C8C #281F8C #5E1F8C

triadic

#281F8C #8C281F #1F8C28

tetradic

#281F8C #8C1F4C #838C1F #1F8C5E

square

#281F8C #8C1F4C #838C1F #1F8C5E

split-complementary

#281F8C #8C5E1F #4C8C1F

monochromatic

#0B0928 #1A145A #281F8C #362ABE #594ED8

Accessibility & contrast

On white

12.61

#281F8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#281F8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8C

12.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8C	#FFFFFF	#000000	##FFFFFF
##281F8C	1.00	12.61	1.67	12.61
#FFFFFF	12.61	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388F

Deuteranopia (green-blind)

#002E8A

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #281f8c;
/* rgb */ color: rgb(40, 31, 140);
/* oklch */ color: oklch(33.9% 0.170 276.0);

Tailwind

colors: {
  custom: {
    50: '#725daf',
    500: '#281f8c',
    950: '#000000',
  },
}

SCSS

$custom: #281f8c;
$custom-light: #725daf;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8c",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 140
  },
  "hsl": {
    "h": 244.954,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.33867,
    "c": 0.16966,
    "h": 276
  },
  "luminance": 0.03325
}

Semantic roles & 50–950 ramp

primary

#281F8C

secondary

#B1BB4C

accent

#E741D9

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #281F8C

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

Preview Lab → · Contrast checker → · Palette generator →