#3840B4#3840B4

#3840B4 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.181 H 273.3°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#3840B4
RGB	rgb(56, 64, 180)
HSL	hsl(236, 53%, 46%)
HSV	hsv(236, 69%, 71%)
CMYK	cmyk(68.9%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(33.57, 35.07, -62.47)
CIE-LCH	lch(33.57, 71.64, 299.31°)
OKLab	oklab(44.15% 0.0104 -0.1803)
OKLCH	oklch(44.15% 0.181 273.3)
XYZ	xyz(11.6997, 7.8017, 44.0605)
Luminance	0.0780 (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

#3840B4 #B4AC38

analogous

#387EB4 #3840B4 #6E38B4

triadic

#3840B4 #B43840 #40B438

tetradic

#3840B4 #B4387E #B4AC38 #38B46E

square

#3840B4 #B4387E #B4AC38 #38B46E

split-complementary

#3840B4 #B46E38 #7EB438

monochromatic

#1B1F57 #292F85 #3840B4 #5D64CD #8B91DB

Accessibility & contrast

On white

8.20

#3840B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3840B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3840B4

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3840B4	#FFFFFF	#000000	##FFFFFF
##3840B4	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#0049B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3840b4;
/* rgb */ color: rgb(56, 64, 180);
/* oklch */ color: oklch(44.1% 0.181 273.3);

Tailwind

colors: {
  custom: {
    50: '#7f75cb',
    500: '#3840b4',
    950: '#000000',
  },
}

SCSS

$custom: #3840b4;
$custom-light: #7f75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3840b4",
  "rgb": {
    "r": 56,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 236.129,
    "s": 52.542,
    "l": 46.275
  },
  "oklch": {
    "l": 0.4415,
    "c": 0.18064,
    "h": 273.3
  },
  "luminance": 0.07803
}

Semantic roles & 50–950 ramp

primary

#3840B4

secondary

#C5C182

accent

#D34CDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3840B4

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

Preview Lab → · Contrast checker → · Palette generator →