#3640A4#3640A4

#3640A4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.160 H 273.2°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#3640A4
RGB	rgb(54, 64, 164)
HSL	hsl(235, 50%, 43%)
HSV	hsv(235, 67%, 64%)
CMYK	cmyk(67.1%, 61%, 0%, 35.7%)
CIE-LAB	lab(32.10, 29.12, -55.31)
CIE-LCH	lch(32.10, 62.51, 297.77°)
OKLab	oklab(42.62% 0.0089 -0.1594)
OKLCH	oklch(42.62% 0.16 273.2)
XYZ	xyz(10.0533, 7.1305, 35.9613)
Luminance	0.0713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3640A4 #A49A36

analogous

#3677A4 #3640A4 #6336A4

triadic

#3640A4 #A43640 #40A436

tetradic

#3640A4 #A43677 #A49A36 #36A463

square

#3640A4 #A43677 #A49A36 #36A463

split-complementary

#3640A4 #A46336 #77A436

monochromatic

#181C48 #272E76 #3640A4 #515CC6 #7F87D5

Accessibility & contrast

On white

8.66

#3640A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3640A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640A4

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640A4	#FFFFFF	#000000	##FFFFFF
##3640A4	1.00	8.66	2.43	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A7

Deuteranopia (green-blind)

#0047A2

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3640a4;
/* rgb */ color: rgb(54, 64, 164);
/* oklch */ color: oklch(42.6% 0.160 273.2);

Tailwind

colors: {
  custom: {
    50: '#7b74c0',
    500: '#3640a4',
    950: '#000000',
  },
}

SCSS

$custom: #3640a4;
$custom-light: #7b74c0;
$custom-dark: #000000;

JSON

{
  "hex": "#3640a4",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 164
  },
  "hsl": {
    "h": 234.545,
    "s": 50.459,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42624,
    "c": 0.15963,
    "h": 273.2
  },
  "luminance": 0.07131
}

Semantic roles & 50–950 ramp

primary

#3640A4

secondary

#BEB878

accent

#CD4EDA

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3640A4

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

Preview Lab → · Contrast checker → · Palette generator →