#3631A4#3631A4

#3631A4 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.0% C 0.178 H 276.6°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#3631A4
RGB	rgb(54, 49, 164)
HSL	hsl(243, 54%, 42%)
HSV	hsv(243, 70%, 64%)
CMYK	cmyk(67.1%, 70.1%, 0%, 35.7%)
CIE-LAB	lab(28.54, 38.57, -61.14)
CIE-LCH	lch(28.54, 72.29, 302.25°)
OKLab	oklab(40.03% 0.0206 -0.1765)
OKLCH	oklch(40.03% 0.178 276.6)
XYZ	xyz(9.3183, 5.6604, 35.7163)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.69

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3631A4 #9FA431

analogous

#3166A4 #3631A4 #7031A4

triadic

#3631A4 #A43631 #31A436

tetradic

#3631A4 #A43166 #9FA431 #31A470

square

#3631A4 #A43166 #9FA431 #31A470

split-complementary

#3631A4 #A47031 #66A431

monochromatic

#171546 #262375 #3631A4 #4F49C9 #7D79D7

Accessibility & contrast

On white

9.85

#3631A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#3631A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631A4

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631A4	#FFFFFF	#000000	##FFFFFF
##3631A4	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A7

Deuteranopia (green-blind)

#003EA2

Tritanopia (blue-blind)

#005066

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3631a4;
/* rgb */ color: rgb(54, 49, 164);
/* oklch */ color: oklch(40.0% 0.178 276.6);

Tailwind

colors: {
  custom: {
    50: '#7c6ac0',
    500: '#3631a4',
    950: '#000000',
  },
}

SCSS

$custom: #3631a4;
$custom-light: #7c6ac0;
$custom-dark: #000000;

JSON

{
  "hex": "#3631a4",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 164
  },
  "hsl": {
    "h": 242.609,
    "s": 53.991,
    "l": 41.765
  },
  "oklch": {
    "l": 0.40025,
    "c": 0.17772,
    "h": 276.6
  },
  "luminance": 0.05661
}

Semantic roles & 50–950 ramp

primary

#3631A4

secondary

#BCBF72

accent

#DD4AD7

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3631A4

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

Preview Lab → · Contrast checker → · Palette generator →