#3631B8#3631B8

#3631B8 is a dark, highly saturated blue. Relative luminance 0.064; OKLCH L 42.0% C 0.203 H 274.9°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#3631B8
RGB	rgb(54, 49, 184)
HSL	hsl(242, 58%, 46%)
HSV	hsv(242, 73%, 72%)
CMYK	cmyk(70.7%, 73.4%, 0%, 27.8%)
CIE-LAB	lab(30.50, 45.21, -69.89)
CIE-LCH	lch(30.50, 83.24, 302.90°)
OKLab	oklab(42.02% 0.0172 -0.2021)
OKLCH	oklch(42.02% 0.203 274.9)
XYZ	xyz(11.2685, 6.4405, 45.9874)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.87

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3631B8 #B3B831

analogous

#316FB8 #3631B8 #7931B8

triadic

#3631B8 #B83631 #31B836

tetradic

#3631B8 #B8316F #B3B831 #31B879

square

#3631B8 #B8316F #B3B831 #31B879

split-complementary

#3631B8 #B87931 #6FB831

monochromatic

#1A1757 #282488 #3631B8 #5955D2 #8885DE

Accessibility & contrast

On white

9.18

#3631B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#3631B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3631B8

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3631B8	#FFFFFF	#000000	##FFFFFF
##3631B8	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBC

Deuteranopia (green-blind)

#0042B6

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3631b8;
/* rgb */ color: rgb(54, 49, 184);
/* oklch */ color: oklch(42.0% 0.203 274.9);

Tailwind

colors: {
  custom: {
    50: '#806bcf',
    500: '#3631b8',
    950: '#000000',
  },
}

SCSS

$custom: #3631b8;
$custom-light: #806bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3631b8",
  "rgb": {
    "r": 54,
    "g": 49,
    "b": 184
  },
  "hsl": {
    "h": 242.222,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42016,
    "c": 0.2028,
    "h": 274.9
  },
  "luminance": 0.06442
}

Semantic roles & 50–950 ramp

primary

#3631B8

secondary

#C5C87D

accent

#E147DB

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3631B8

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

Preview Lab → · Contrast checker → · Palette generator →