#3640BA#3640BA

#3640BA is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.189 H 272.4°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#3640BA
RGB	rgb(54, 64, 186)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 73%)
CMYK	cmyk(71%, 65.6%, 0%, 27.1%)
CIE-LAB	lab(33.97, 36.92, -65.36)
CIE-LCH	lch(33.97, 75.07, 299.46°)
OKLab	oklab(44.58% 0.0078 -0.1888)
OKLCH	oklch(44.58% 0.189 272.4)
XYZ	xyz(12.2147, 7.9950, 47.3443)
Luminance	0.0800 (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

#3640BA #BAB036

analogous

#3682BA #3640BA #6E36BA

triadic

#3640BA #BA3640 #40BA36

tetradic

#3640BA #BA3682 #BAB036 #36BA6E

square

#3640BA #BA3682 #BAB036 #36BA6E

split-complementary

#3640BA #BA6E36 #82BA36

monochromatic

#1A1F5B #28308B #3640BA #5D66D0 #8D93DE

Accessibility & contrast

On white

8.08

#3640BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3640BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640BA

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640BA	#FFFFFF	#000000	##FFFFFF
##3640BA	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BE

Deuteranopia (green-blind)

#004AB8

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3640ba;
/* rgb */ color: rgb(54, 64, 186);
/* oklch */ color: oklch(44.6% 0.189 272.4);

Tailwind

colors: {
  custom: {
    50: '#7f75d0',
    500: '#3640ba',
    950: '#000000',
  },
}

SCSS

$custom: #3640ba;
$custom-light: #7f75d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3640ba",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 186
  },
  "hsl": {
    "h": 235.455,
    "s": 55,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44577,
    "c": 0.189,
    "h": 272.4
  },
  "luminance": 0.07996
}

Semantic roles & 50–950 ramp

primary

#3640BA

secondary

#C8C384

accent

#D349DE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3640BA

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

Preview Lab → · Contrast checker → · Palette generator →