#3840B1#3840B1

#3840B1 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.177 H 273.4°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3840B1
RGB	rgb(56, 64, 177)
HSL	hsl(236, 52%, 46%)
HSV	hsv(236, 68%, 69%)
CMYK	cmyk(68.4%, 63.8%, 0%, 30.6%)
CIE-LAB	lab(33.31, 34.02, -61.11)
CIE-LCH	lch(33.31, 69.94, 299.11°)
OKLab	oklab(43.88% 0.0106 -0.1763)
OKLCH	oklch(43.88% 0.177 273.4)
XYZ	xyz(11.3974, 7.6808, 42.4684)
Luminance	0.0768 (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

#3840B1 #B1A938

analogous

#387CB1 #3840B1 #6C38B1

triadic

#3840B1 #B13840 #40B138

tetradic

#3840B1 #B1387C #B1A938 #38B16C

square

#3840B1 #B1387C #B1A938 #38B16C

split-complementary

#3840B1 #B16C38 #7CB138

monochromatic

#1B1E54 #292F83 #3840B1 #5B62CB #8A8FDA

Accessibility & contrast

On white

8.28

#3840B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3840B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3840B1

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3840B1	#FFFFFF	#000000	##FFFFFF
##3840B1	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3840b1;
/* rgb */ color: rgb(56, 64, 177);
/* oklch */ color: oklch(43.9% 0.177 273.4);

Tailwind

colors: {
  custom: {
    50: '#7e75c9',
    500: '#3840b1',
    950: '#000000',
  },
}

SCSS

$custom: #3840b1;
$custom-light: #7e75c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3840b1",
  "rgb": {
    "r": 56,
    "g": 64,
    "b": 177
  },
  "hsl": {
    "h": 236.033,
    "s": 51.931,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43882,
    "c": 0.17667,
    "h": 273.4
  },
  "luminance": 0.07682
}

Semantic roles & 50–950 ramp

primary

#3840B1

secondary

#C4C081

accent

#D24CDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3840B1

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

Preview Lab → · Contrast checker → · Palette generator →