#3631B5#3631B5

#3631B5 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.7% C 0.199 H 275.1°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#3631B5
RGB	rgb(54, 49, 181)
HSL	hsl(242, 57%, 45%)
HSV	hsv(242, 73%, 71%)
CMYK	cmyk(70.2%, 72.9%, 0%, 29%)
CIE-LAB	lab(30.20, 44.23, -68.60)
CIE-LCH	lch(30.20, 81.62, 302.81°)
OKLab	oklab(41.71% 0.0177 -0.1983)
OKLCH	oklch(41.71% 0.199 275.1)
XYZ	xyz(10.9574, 6.3161, 44.3488)
Luminance	0.0632 (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

#3631B5 #B0B531

analogous

#316EB5 #3631B5 #7831B5

triadic

#3631B5 #B53631 #31B536

tetradic

#3631B5 #B5316E #B0B531 #31B578

square

#3631B5 #B5316E #B0B531 #31B578

split-complementary

#3631B5 #B57831 #6EB531

monochromatic

#191755 #282485 #3631B5 #5853D0 #8683DD

Accessibility & contrast

On white

9.28

#3631B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3631B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631B5

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631B5	#FFFFFF	#000000	##FFFFFF
##3631B5	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB9

Deuteranopia (green-blind)

#0041B3

Tritanopia (blue-blind)

#005670

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3631b5;
/* rgb */ color: rgb(54, 49, 181);
/* oklch */ color: oklch(41.7% 0.199 275.1);

Tailwind

colors: {
  custom: {
    50: '#7f6bcc',
    500: '#3631b5',
    950: '#000000',
  },
}

SCSS

$custom: #3631b5;
$custom-light: #7f6bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3631b5",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 181
  },
  "hsl": {
    "h": 242.273,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.41711,
    "c": 0.19912,
    "h": 275.1
  },
  "luminance": 0.06317
}

Semantic roles & 50–950 ramp

primary

#3631B5

secondary

#C4C77B

accent

#E147DB

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3631B5

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

Preview Lab → · Contrast checker → · Palette generator →