#3641BB#3641BB

#3641BB is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.8% C 0.189 H 272.1°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3641BB
RGB	rgb(54, 65, 187)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 73%)
CMYK	cmyk(71.1%, 65.2%, 0%, 26.7%)
CIE-LAB	lab(34.30, 36.65, -65.42)
CIE-LCH	lch(34.30, 74.98, 299.26°)
OKLab	oklab(44.84% 0.007 -0.189)
OKLCH	oklch(44.84% 0.189 272.1)
XYZ	xyz(12.3782, 8.1515, 47.9251)
Luminance	0.0815 (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

#3641BB #BBB036

analogous

#3683BB #3641BB #6E36BB

triadic

#3641BB #BB3641 #41BB36

tetradic

#3641BB #BB3683 #BBB036 #36BB6E

square

#3641BB #BB3683 #BBB036 #36BB6E

split-complementary

#3641BB #BB6E36 #83BB36

monochromatic

#1B205C #28308C #3641BB #5E67D0 #8D94DE

Accessibility & contrast

On white

7.98

#3641BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3641BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3641BB

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3641BB	#FFFFFF	#000000	##FFFFFF
##3641BB	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3641bb;
/* rgb */ color: rgb(54, 65, 187);
/* oklch */ color: oklch(44.8% 0.189 272.1);

Tailwind

colors: {
  custom: {
    50: '#7f76d0',
    500: '#3641bb',
    950: '#000000',
  },
}

SCSS

$custom: #3641bb;
$custom-light: #7f76d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3641bb",
  "rgb": {
    "r": 54,
    "g": 65,
    "b": 187
  },
  "hsl": {
    "h": 235.038,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44841,
    "c": 0.18914,
    "h": 272.1
  },
  "luminance": 0.08153
}

Semantic roles & 50–950 ramp

primary

#3641BB

secondary

#C9C384

accent

#D249DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3641BB

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

Preview Lab → · Contrast checker → · Palette generator →