#3840B7#3840B7

#3840B7 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.185 H 273.2°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3840B7
RGB	rgb(56, 64, 183)
HSL	hsl(236, 53%, 47%)
HSV	hsv(236, 69%, 72%)
CMYK	cmyk(69.4%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.83, 36.12, -63.82)
CIE-LCH	lch(33.83, 73.34, 299.51°)
OKLab	oklab(44.42% 0.0102 -0.1843)
OKLCH	oklch(44.42% 0.185 273.2)
XYZ	xyz(12.0087, 7.9253, 45.6874)
Luminance	0.0793 (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

#3840B7 #B7AF38

analogous

#3880B7 #3840B7 #6F38B7

triadic

#3840B7 #B73840 #40B738

tetradic

#3840B7 #B73880 #B7AF38 #38B76F

square

#3840B7 #B73880 #B7AF38 #38B76F

split-complementary

#3840B7 #B76F38 #80B738

monochromatic

#1B1F59 #2A3088 #3840B7 #5E65CE #8D92DC

Accessibility & contrast

On white

8.12

#3840B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3840B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3840B7

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3840B7	#FFFFFF	#000000	##FFFFFF
##3840B7	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#004AB5

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3840b7;
/* rgb */ color: rgb(56, 64, 183);
/* oklch */ color: oklch(44.4% 0.185 273.2);

Tailwind

colors: {
  custom: {
    50: '#7f75ce',
    500: '#3840b7',
    950: '#000000',
  },
}

SCSS

$custom: #3840b7;
$custom-light: #7f75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3840b7",
  "rgb": {
    "r": 56,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 236.22,
    "s": 53.138,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44421,
    "c": 0.18457,
    "h": 273.2
  },
  "luminance": 0.07926
}

Semantic roles & 50–950 ramp

primary

#3840B7

secondary

#C7C384

accent

#D34BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3840B7

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

Preview Lab → · Contrast checker → · Palette generator →