#3631BB#3631BB

#3631BB is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.3% C 0.206 H 274.6°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#3631BB
RGB	rgb(54, 49, 187)
HSL	hsl(242, 58%, 46%)
HSV	hsv(242, 74%, 73%)
CMYK	cmyk(71.1%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(30.80, 46.19, -71.16)
CIE-LCH	lch(30.80, 84.84, 302.98°)
OKLab	oklab(42.32% 0.0166 -0.2058)
OKLCH	oklch(42.32% 0.206 274.6)
XYZ	xyz(11.5863, 6.5676, 47.6611)
Luminance	0.0657 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3631BB #B6BB31

analogous

#3171BB #3631BB #7B31BB

triadic

#3631BB #BB3631 #31BB36

tetradic

#3631BB #BB3171 #B6BB31 #31BB7B

square

#3631BB #BB3171 #B6BB31 #31BB7B

split-complementary

#3631BB #BB7B31 #71BB31

monochromatic

#1A185A #28248B #3631BB #5B56D3 #8A87E0

Accessibility & contrast

On white

9.08

#3631BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3631BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631BB

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631BB	#FFFFFF	#000000	##FFFFFF
##3631BB	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0042B9

Tritanopia (blue-blind)

#005973

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3631bb;
/* rgb */ color: rgb(54, 49, 187);
/* oklch */ color: oklch(42.3% 0.206 274.6);

Tailwind

colors: {
  custom: {
    50: '#816bd1',
    500: '#3631bb',
    950: '#000000',
  },
}

SCSS

$custom: #3631bb;
$custom-light: #816bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3631bb",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 242.174,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42323,
    "c": 0.20646,
    "h": 274.6
  },
  "luminance": 0.06569
}

Semantic roles & 50–950 ramp

primary

#3631BB

secondary

#C6C97F

accent

#E246DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3631BB

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

Preview Lab → · Contrast checker → · Palette generator →