#3631B3#3631B3

#3631B3 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.5% C 0.197 H 275.3°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#3631B3
RGB	rgb(54, 49, 179)
HSL	hsl(242, 57%, 45%)
HSV	hsv(242, 73%, 70%)
CMYK	cmyk(69.8%, 72.6%, 0%, 29.8%)
CIE-LAB	lab(30.00, 43.57, -67.74)
CIE-LCH	lch(30.00, 80.54, 302.75°)
OKLab	oklab(41.51% 0.0181 -0.1958)
OKLCH	oklch(41.51% 0.197 275.3)
XYZ	xyz(10.7536, 6.2346, 43.2758)
Luminance	0.0624 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3631B3 #AEB331

analogous

#316DB3 #3631B3 #7731B3

triadic

#3631B3 #B33631 #31B336

tetradic

#3631B3 #B3316D #AEB331 #31B377

square

#3631B3 #B3316D #AEB331 #31B377

split-complementary

#3631B3 #B37731 #6DB331

monochromatic

#191753 #282483 #3631B3 #5652D0 #8582DD

Accessibility & contrast

On white

9.34

#3631B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#3631B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631B3

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631B3	#FFFFFF	#000000	##FFFFFF
##3631B3	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB7

Deuteranopia (green-blind)

#0041B1

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3631b3;
/* rgb */ color: rgb(54, 49, 179);
/* oklch */ color: oklch(41.5% 0.197 275.3);

Tailwind

colors: {
  custom: {
    50: '#7f6bcb',
    500: '#3631b3',
    950: '#000000',
  },
}

SCSS

$custom: #3631b3;
$custom-light: #7f6bcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3631b3",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 179
  },
  "hsl": {
    "h": 242.308,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41509,
    "c": 0.19665,
    "h": 275.3
  },
  "luminance": 0.06236
}

Semantic roles & 50–950 ramp

primary

#3631B3

secondary

#C3C67A

accent

#E048DA

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3631B3

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

Preview Lab → · Contrast checker → · Palette generator →