#3631BC#3631BC

#3631BC is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.4% C 0.208 H 274.5°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#3631BC
RGB	rgb(54, 49, 188)
HSL	hsl(242, 59%, 46%)
HSV	hsv(242, 74%, 74%)
CMYK	cmyk(71.3%, 73.9%, 0%, 26.3%)
CIE-LAB	lab(30.90, 46.51, -71.59)
CIE-LCH	lch(30.90, 85.37, 303.01°)
OKLab	oklab(42.43% 0.0164 -0.207)
OKLCH	oklch(42.43% 0.208 274.5)
XYZ	xyz(11.6937, 6.6106, 48.2269)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.17

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3631BC #B7BC31

analogous

#3172BC #3631BC #7C31BC

triadic

#3631BC #BC3631 #31BC36

tetradic

#3631BC #BC3172 #B7BC31 #31BC7C

square

#3631BC #BC3172 #B7BC31 #31BC7C

split-complementary

#3631BC #BC7C31 #72BC31

monochromatic

#1A185B #28248B #3631BC #5B57D3 #8B88E0

Accessibility & contrast

On white

9.04

#3631BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3631BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631BC

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631BC	#FFFFFF	#000000	##FFFFFF
##3631BC	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FC0

Deuteranopia (green-blind)

#0042BA

Tritanopia (blue-blind)

#005974

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3631bc;
/* rgb */ color: rgb(54, 49, 188);
/* oklch */ color: oklch(42.4% 0.208 274.5);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#3631bc",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 188
  },
  "hsl": {
    "h": 242.158,
    "s": 58.65,
    "l": 46.471
  },
  "oklch": {
    "l": 0.42425,
    "c": 0.20767,
    "h": 274.5
  },
  "luminance": 0.06612
}

Semantic roles & 50–950 ramp

primary

#3631BC

secondary

#C7CA7F

accent

#E246DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3631BC

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

Preview Lab → · Contrast checker → · Palette generator →