#281B77#281B77

#281B77 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.0% C 0.147 H 279.9°. Best body text is #FFFFFF at 13.88:1 contrast (WCAG AA passes).

Color values

HEX	#281B77
RGB	rgb(40, 27, 119)
HSL	hsl(248, 63%, 29%)
HSV	hsv(248, 77%, 47%)
CMYK	cmyk(66.4%, 77.3%, 0%, 53.3%)
CIE-LAB	lab(18.22, 34.67, -50.16)
CIE-LCH	lch(18.22, 60.98, 304.65°)
OKLab	oklab(31.01% 0.0253 -0.1448)
OKLCH	oklch(31.01% 0.147 279.9)
XYZ	xyz(4.5957, 2.5665, 17.7024)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B77 #6A771B

analogous

#1B3C77 #281B77 #561B77

triadic

#281B77 #77281B #1B7728

tetradic

#281B77 #771B3C #6A771B #1B7756

square

#281B77 #771B3C #6A771B #1B7756

split-complementary

#281B77 #77561B #3C771B

monochromatic

#080619 #171045 #281B77 #3926A9 #503AD2

Accessibility & contrast

On white

13.88

#281B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#281B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B77

13.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B77	#FFFFFF	#000000	##FFFFFF
##281B77	1.00	13.88	1.51	13.88
#FFFFFF	13.88	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00307A

Deuteranopia (green-blind)

#002975

Tritanopia (blue-blind)

#003547

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #281b77;
/* rgb */ color: rgb(40, 27, 119);
/* oklch */ color: oklch(31.0% 0.147 279.9);

Tailwind

colors: {
  custom: {
    50: '#6e599f',
    500: '#281b77',
    950: '#000000',
  },
}

SCSS

$custom: #281b77;
$custom-light: #6e599f;
$custom-dark: #000000;

JSON

{
  "hex": "#281b77",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 119
  },
  "hsl": {
    "h": 248.478,
    "s": 63.014,
    "l": 28.627
  },
  "oklch": {
    "l": 0.31014,
    "c": 0.14696,
    "h": 279.9
  },
  "luminance": 0.02567
}

Semantic roles & 50–950 ramp

primary

#281B77

secondary

#9DAB42

accent

#E642CF

background

#F7F5F9

surface

#EDE9F2

border

#C8C5CC

text

#08040F

muted

#7B797E

Preview Lab

Preview with #281B77

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

Preview Lab → · Contrast checker → · Palette generator →