#3640A3#3640A3

#3640A3 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.158 H 273.2°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#3640A3
RGB	rgb(54, 64, 163)
HSL	hsl(234, 50%, 43%)
HSV	hsv(234, 67%, 64%)
CMYK	cmyk(66.9%, 60.7%, 0%, 36.1%)
CIE-LAB	lab(32.02, 28.77, -54.84)
CIE-LCH	lch(32.02, 61.93, 297.68°)
OKLab	oklab(42.54% 0.0089 -0.158)
OKLCH	oklch(42.54% 0.158 273.2)
XYZ	xyz(9.9634, 7.0945, 35.4875)
Luminance	0.0709 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3640A3 #A39936

analogous

#3677A3 #3640A3 #6236A3

triadic

#3640A3 #A33640 #40A336

tetradic

#3640A3 #A33677 #A39936 #36A362

square

#3640A3 #A33677 #A39936 #36A362

split-complementary

#3640A3 #A36236 #77A336

monochromatic

#181C47 #272E75 #3640A3 #515CC5 #7F87D5

Accessibility & contrast

On white

8.68

#3640A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3640A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640A3

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640A3	#FFFFFF	#000000	##FFFFFF
##3640A3	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A6

Deuteranopia (green-blind)

#0047A1

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3640a3;
/* rgb */ color: rgb(54, 64, 163);
/* oklch */ color: oklch(42.5% 0.158 273.2);

Tailwind

colors: {
  custom: {
    50: '#7a74bf',
    500: '#3640a3',
    950: '#000000',
  },
}

SCSS

$custom: #3640a3;
$custom-light: #7a74bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3640a3",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 163
  },
  "hsl": {
    "h": 234.495,
    "s": 50.23,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42539,
    "c": 0.15825,
    "h": 273.2
  },
  "luminance": 0.07095
}

Semantic roles & 50–950 ramp

primary

#3640A3

secondary

#BEB777

accent

#CD4EDA

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3640A3

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

Preview Lab → · Contrast checker → · Palette generator →