#281B7C#281B7C

#281B7C is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.6% C 0.153 H 279.0°. Best body text is #FFFFFF at 13.65:1 contrast (WCAG AA passes).

Color values

HEX	#281B7C
RGB	rgb(40, 27, 124)
HSL	hsl(248, 64%, 30%)
HSV	hsv(248, 78%, 49%)
CMYK	cmyk(67.7%, 78.2%, 0%, 51.4%)
CIE-LAB	lab(18.76, 36.33, -52.47)
CIE-LCH	lch(18.76, 63.82, 304.70°)
OKLab	oklab(31.56% 0.024 -0.1515)
OKLCH	oklch(31.56% 0.153 279)
XYZ	xyz(4.9039, 2.6898, 19.3256)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B7C #6F7C1B

analogous

#1B3F7C #281B7C #591B7C

triadic

#281B7C #7C281B #1B7C28

tetradic

#281B7C #7C1B3F #6F7C1B #1B7C59

square

#281B7C #7C1B3F #6F7C1B #1B7C59

split-complementary

#281B7C #7C591B #3F7C1B

monochromatic

#080519 #18104A #281B7C #3826AE #513DD5

Accessibility & contrast

On white

13.65

#281B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#281B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B7C

13.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B7C	#FFFFFF	#000000	##FFFFFF
##281B7C	1.00	13.65	1.54	13.65
#FFFFFF	13.65	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317F

Deuteranopia (green-blind)

#002A7A

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #281b7c;
/* rgb */ color: rgb(40, 27, 124);
/* oklch */ color: oklch(31.6% 0.153 279.0);

Tailwind

colors: {
  custom: {
    50: '#6f5aa3',
    500: '#281b7c',
    950: '#000000',
  },
}

SCSS

$custom: #281b7c;
$custom-light: #6f5aa3;
$custom-dark: #000000;

JSON

{
  "hex": "#281b7c",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 124
  },
  "hsl": {
    "h": 248.041,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31556,
    "c": 0.1534,
    "h": 279
  },
  "luminance": 0.0269
}

Semantic roles & 50–950 ramp

primary

#281B7C

secondary

#A1B043

accent

#E741D1

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #281B7C

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

Preview Lab → · Contrast checker → · Palette generator →