#281F8E#281F8E

#281F8E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.1% C 0.172 H 275.8°. Best body text is #FFFFFF at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#281F8E
RGB	rgb(40, 31, 142)
HSL	hsl(245, 64%, 34%)
HSV	hsv(245, 78%, 56%)
CMYK	cmyk(71.8%, 78.2%, 0%, 44.3%)
CIE-LAB	lab(21.52, 40.05, -59.25)
CIE-LCH	lch(21.52, 71.52, 304.06°)
OKLab	oklab(34.09% 0.0173 -0.1713)
OKLCH	oklch(34.09% 0.172 275.8)
XYZ	xyz(6.2459, 3.3835, 25.9099)
Luminance	0.0338 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F8E #858E1F

analogous

#1F4E8E #281F8E #601F8E

triadic

#281F8E #8E281F #1F8E28

tetradic

#281F8E #8E1F4E #858E1F #1F8E60

square

#281F8E #8E1F4E #858E1F #1F8E60

split-complementary

#281F8E #8E601F #4E8E1F

monochromatic

#0C092A #1A145C #281F8E #362AC0 #5A4FD9

Accessibility & contrast

On white

12.52

#281F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#281F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F8E

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F8E	#FFFFFF	#000000	##FFFFFF
##281F8E	1.00	12.52	1.68	12.52
#FFFFFF	12.52	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003891

Deuteranopia (green-blind)

#002F8C

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #281f8e;
/* rgb */ color: rgb(40, 31, 142);
/* oklch */ color: oklch(34.1% 0.172 275.8);

Tailwind

colors: {
  custom: {
    50: '#735db0',
    500: '#281f8e',
    950: '#000000',
  },
}

SCSS

$custom: #281f8e;
$custom-light: #735db0;
$custom-dark: #000000;

JSON

{
  "hex": "#281f8e",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 142
  },
  "hsl": {
    "h": 244.865,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.34088,
    "c": 0.17216,
    "h": 275.8
  },
  "luminance": 0.03384
}

Semantic roles & 50–950 ramp

primary

#281F8E

secondary

#B3BB4D

accent

#E741DA

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281F8E

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

Preview Lab → · Contrast checker → · Palette generator →