#281B7D#281B7D

#281B7D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.7% C 0.155 H 278.8°. Best body text is #FFFFFF at 13.61:1 contrast (WCAG AA passes).

Color values

HEX	#281B7D
RGB	rgb(40, 27, 125)
HSL	hsl(248, 64%, 30%)
HSV	hsv(248, 78%, 49%)
CMYK	cmyk(68%, 78.4%, 0%, 51%)
CIE-LAB	lab(18.87, 36.66, -52.93)
CIE-LCH	lch(18.87, 64.39, 304.71°)
OKLab	oklab(31.67% 0.0238 -0.1528)
OKLCH	oklch(31.67% 0.155 278.8)
XYZ	xyz(4.9675, 2.7152, 19.6604)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281B7D #707D1B

analogous

#1B3F7D #281B7D #591B7D

triadic

#281B7D #7D281B #1B7D28

tetradic

#281B7D #7D1B3F #707D1B #1B7D59

square

#281B7D #7D1B3F #707D1B #1B7D59

split-complementary

#281B7D #7D591B #3F7D1B

monochromatic

#080519 #18104B #281B7D #3826AF #513DD5

Accessibility & contrast

On white

13.61

#281B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#281B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281B7D

13.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281B7D	#FFFFFF	#000000	##FFFFFF
##281B7D	1.00	13.61	1.54	13.61
#FFFFFF	13.61	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003280

Deuteranopia (green-blind)

#002A7B

Tritanopia (blue-blind)

#00374B

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #281b7d;
/* rgb */ color: rgb(40, 27, 125);
/* oklch */ color: oklch(31.7% 0.155 278.8);

Tailwind

colors: {
  custom: {
    50: '#6f5aa4',
    500: '#281b7d',
    950: '#000000',
  },
}

SCSS

$custom: #281b7d;
$custom-light: #6f5aa4;
$custom-dark: #000000;

JSON

{
  "hex": "#281b7d",
  "rgb": {
    "r": 40,
    "g": 27,
    "b": 125
  },
  "hsl": {
    "h": 247.959,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31665,
    "c": 0.15468,
    "h": 278.8
  },
  "luminance": 0.02716
}

Semantic roles & 50–950 ramp

primary

#281B7D

secondary

#A2B143

accent

#E740D1

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #281B7D

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

Preview Lab → · Contrast checker → · Palette generator →