#281B7F#281B7F

#281B7F is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.9% C 0.157 H 278.5°. Best body text is #FFFFFF at 13.52:1 contrast (WCAG AA passes).

Color values

HEX	#281B7F
RGB	rgb(40, 27, 127)
HSL	hsl(248, 65%, 30%)
HSV	hsv(248, 79%, 50%)
CMYK	cmyk(68.5%, 78.7%, 0%, 50.2%)
CIE-LAB	lab(19.09, 37.32, -53.84)
CIE-LCH	lch(19.09, 65.51, 304.73°)
OKLab	oklab(31.89% 0.0232 -0.1555)
OKLCH	oklch(31.89% 0.157 278.5)
XYZ	xyz(5.0965, 2.7669, 20.3400)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B7F #727F1B

analogous

#1B407F #281B7F #5A1B7F

triadic

#281B7F #7F281B #1B7F28

tetradic

#281B7F #7F1B40 #727F1B #1B7F5A

square

#281B7F #7F1B40 #727F1B #1B7F5A

split-complementary

#281B7F #7F5A1B #407F1B

monochromatic

#08061A #18104D #281B7F #3826B1 #523ED6

Accessibility & contrast

On white

13.52

#281B7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#281B7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B7F

13.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B7F	#FFFFFF	#000000	##FFFFFF
##281B7F	1.00	13.52	1.55	13.52
#FFFFFF	13.52	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003282

Deuteranopia (green-blind)

#002A7D

Tritanopia (blue-blind)

#00384C

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #281b7f;
/* rgb */ color: rgb(40, 27, 127);
/* oklch */ color: oklch(31.9% 0.157 278.5);

Tailwind

colors: {
  custom: {
    50: '#6f5aa5',
    500: '#281b7f',
    950: '#000000',
  },
}

SCSS

$custom: #281b7f;
$custom-light: #6f5aa5;
$custom-dark: #000000;

JSON

{
  "hex": "#281b7f",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 127
  },
  "hsl": {
    "h": 247.8,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.31885,
    "c": 0.15723,
    "h": 278.5
  },
  "luminance": 0.02767
}

Semantic roles & 50–950 ramp

primary

#281B7F

secondary

#A4B343

accent

#E840D2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #281B7F

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

Preview Lab → · Contrast checker → · Palette generator →