#3644B4#3644B4

#3644B4 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.7% C 0.176 H 271.7°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#3644B4
RGB	rgb(54, 68, 180)
HSL	hsl(233, 54%, 46%)
HSV	hsv(233, 70%, 71%)
CMYK	cmyk(70%, 62.2%, 0%, 29.4%)
CIE-LAB	lab(34.42, 32.26, -61.08)
CIE-LCH	lch(34.42, 69.08, 297.84°)
OKLab	oklab(44.75% 0.0053 -0.1763)
OKLCH	oklch(44.75% 0.176 271.7)
XYZ	xyz(11.8239, 8.2127, 44.1332)
Luminance	0.0821 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3644B4 #B4A636

analogous

#3683B4 #3644B4 #6736B4

triadic

#3644B4 #B43644 #44B436

tetradic

#3644B4 #B43683 #B4A636 #36B467

square

#3644B4 #B43683 #B4A636 #36B467

split-complementary

#3644B4 #B46736 #83B436

monochromatic

#1A2056 #283285 #3644B4 #5A67CD #8992DC

Accessibility & contrast

On white

7.95

#3644B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3644B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3644B4

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3644B4	#FFFFFF	#000000	##FFFFFF
##3644B4	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B8

Deuteranopia (green-blind)

#004BB2

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3644b4;
/* rgb */ color: rgb(54, 68, 180);
/* oklch */ color: oklch(44.7% 0.176 271.7);

Tailwind

colors: {
  custom: {
    50: '#7e78cb',
    500: '#3644b4',
    950: '#000000',
  },
}

SCSS

$custom: #3644b4;
$custom-light: #7e78cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3644b4",
  "rgb": {
    "r": 54,
    "g": 68,
    "b": 180
  },
  "hsl": {
    "h": 233.333,
    "s": 53.846,
    "l": 45.882
  },
  "oklch": {
    "l": 0.44747,
    "c": 0.17635,
    "h": 271.7
  },
  "luminance": 0.08214
}

Semantic roles & 50–950 ramp

primary

#3644B4

secondary

#C6BE80

accent

#CD4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3644B4

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

Preview Lab → · Contrast checker → · Palette generator →