#3840B8#3840B8

#3840B8 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.186 H 273.1°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#3840B8
RGB	rgb(56, 64, 184)
HSL	hsl(236, 53%, 47%)
HSV	hsv(236, 70%, 72%)
CMYK	cmyk(69.6%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(33.91, 36.47, -64.27)
CIE-LCH	lch(33.91, 73.90, 299.57°)
OKLab	oklab(44.51% 0.0101 -0.1856)
OKLCH	oklch(44.51% 0.186 273.1)
XYZ	xyz(12.1131, 7.9671, 46.2375)
Luminance	0.0797 (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

#3840B8 #B8B038

analogous

#3880B8 #3840B8 #7038B8

triadic

#3840B8 #B83840 #40B838

tetradic

#3840B8 #B83880 #B8B038 #38B870

square

#3840B8 #B83880 #B8B038 #38B870

split-complementary

#3840B8 #B87038 #80B838

monochromatic

#1B1F5A #2A3089 #3840B8 #5F66CE #8E93DD

Accessibility & contrast

On white

8.10

#3840B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3840B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3840B8

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3840B8	#FFFFFF	#000000	##FFFFFF
##3840B8	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3840b8;
/* rgb */ color: rgb(56, 64, 184);
/* oklch */ color: oklch(44.5% 0.186 273.1);

Tailwind

colors: {
  custom: {
    50: '#8075ce',
    500: '#3840b8',
    950: '#000000',
  },
}

SCSS

$custom: #3840b8;
$custom-light: #8075ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3840b8",
  "rgb": {
    "r": 56,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 236.25,
    "s": 53.333,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44512,
    "c": 0.18588,
    "h": 273.1
  },
  "luminance": 0.07968
}

Semantic roles & 50–950 ramp

primary

#3840B8

secondary

#C7C385

accent

#D44BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3840B8

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

Preview Lab → · Contrast checker → · Palette generator →