#3644B2#3644B2

#3644B2 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.6% C 0.174 H 271.8°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#3644B2
RGB	rgb(54, 68, 178)
HSL	hsl(233, 53%, 45%)
HSV	hsv(233, 70%, 70%)
CMYK	cmyk(69.7%, 61.8%, 0%, 30.2%)
CIE-LAB	lab(34.26, 31.55, -60.16)
CIE-LCH	lch(34.26, 67.93, 297.67°)
OKLab	oklab(44.57% 0.0053 -0.1736)
OKLCH	oklch(44.57% 0.174 271.8)
XYZ	xyz(11.6216, 8.1317, 43.0680)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3644B2 #B2A436

analogous

#3682B2 #3644B2 #6636B2

triadic

#3644B2 #B23644 #44B236

tetradic

#3644B2 #B23682 #B2A436 #36B266

square

#3644B2 #B23682 #B2A436 #36B266

split-complementary

#3644B2 #B26636 #82B236

monochromatic

#1A2054 #283283 #3644B2 #5966CD #8891DB

Accessibility & contrast

On white

8.00

#3644B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3644B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3644B2

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3644B2	#FFFFFF	#000000	##FFFFFF
##3644B2	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B6

Deuteranopia (green-blind)

#004BB0

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3644b2;
/* rgb */ color: rgb(54, 68, 178);
/* oklch */ color: oklch(44.6% 0.174 271.8);

Tailwind

colors: {
  custom: {
    50: '#7d78ca',
    500: '#3644b2',
    950: '#000000',
  },
}

SCSS

$custom: #3644b2;
$custom-light: #7d78ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3644b2",
  "rgb": {
    "r": 54,
    "g": 68,
    "b": 178
  },
  "hsl": {
    "h": 233.226,
    "s": 53.448,
    "l": 45.49
  },
  "oklch": {
    "l": 0.44573,
    "c": 0.17367,
    "h": 271.8
  },
  "luminance": 0.08133
}

Semantic roles & 50–950 ramp

primary

#3644B2

secondary

#C5BD7F

accent

#CC4BDD

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3644B2

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

Preview Lab → · Contrast checker → · Palette generator →