#3639B3#3639B3

#3639B3 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.8% C 0.188 H 274.0°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#3639B3
RGB	rgb(54, 57, 179)
HSL	hsl(239, 54%, 46%)
HSV	hsv(239, 70%, 70%)
CMYK	cmyk(69.8%, 68.2%, 0%, 29.8%)
CIE-LAB	lab(31.73, 38.82, -64.90)
CIE-LCH	lch(31.73, 75.63, 300.89°)
OKLab	oklab(42.75% 0.0131 -0.1875)
OKLCH	oklch(42.75% 0.188 274)
XYZ	xyz(11.1184, 6.9641, 43.3974)
Luminance	0.0697 (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

#3639B3 #B3B036

analogous

#3677B3 #3639B3 #7136B3

triadic

#3639B3 #B33639 #39B336

tetradic

#3639B3 #B33677 #B3B036 #36B371

square

#3639B3 #B33677 #B3B036 #36B371

split-complementary

#3639B3 #B37136 #77B336

monochromatic

#1A1B55 #282A84 #3639B3 #595CCD #888ADB

Accessibility & contrast

On white

8.78

#3639B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3639B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3639B3

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3639B3	#FFFFFF	#000000	##FFFFFF
##3639B3	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3639b3;
/* rgb */ color: rgb(54, 57, 179);
/* oklch */ color: oklch(42.8% 0.188 274.0);

Tailwind

colors: {
  custom: {
    50: '#7e70cb',
    500: '#3639b3',
    950: '#000000',
  },
}

SCSS

$custom: #3639b3;
$custom-light: #7e70cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3639b3",
  "rgb": {
    "r": 54,
    "g": 57,
    "b": 179
  },
  "hsl": {
    "h": 238.56,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.4275,
    "c": 0.18799,
    "h": 274
  },
  "luminance": 0.06965
}

Semantic roles & 50–950 ramp

primary

#3639B3

secondary

#C5C480

accent

#DA4BDD

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3639B3

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

Preview Lab → · Contrast checker → · Palette generator →