#3640BB#3640BB

#3640BB is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.7% C 0.190 H 272.3°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#3640BB
RGB	rgb(54, 64, 187)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 73%)
CMYK	cmyk(71.1%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.06, 37.27, -65.80)
CIE-LCH	lch(34.06, 75.62, 299.53°)
OKLab	oklab(44.67% 0.0077 -0.1901)
OKLCH	oklch(44.67% 0.19 272.3)
XYZ	xyz(12.3213, 8.0377, 47.9062)
Luminance	0.0804 (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

#3640BB #BBB136

analogous

#3682BB #3640BB #6F36BB

triadic

#3640BB #BB3640 #40BB36

tetradic

#3640BB #BB3682 #BBB136 #36BB6F

square

#3640BB #BB3682 #BBB136 #36BB6F

split-complementary

#3640BB #BB6F36 #82BB36

monochromatic

#1B1F5C #28308C #3640BB #5E66D0 #8D93DE

Accessibility & contrast

On white

8.05

#3640BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3640BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640BB

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640BB	#FFFFFF	#000000	##FFFFFF
##3640BB	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3640bb;
/* rgb */ color: rgb(54, 64, 187);
/* oklch */ color: oklch(44.7% 0.190 272.3);

Tailwind

colors: {
  custom: {
    50: '#7f75d1',
    500: '#3640bb',
    950: '#000000',
  },
}

SCSS

$custom: #3640bb;
$custom-light: #7f75d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3640bb",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 235.489,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44669,
    "c": 0.1903,
    "h": 272.3
  },
  "luminance": 0.08039
}

Semantic roles & 50–950 ramp

primary

#3640BB

secondary

#C9C384

accent

#D349DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3640BB

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

Preview Lab → · Contrast checker → · Palette generator →