#3643BB#3643BB

#3643BB is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.2% C 0.187 H 271.7°. Best body text is #FFFFFF at 7.84:1 contrast (WCAG AA passes).

Color values

HEX	#3643BB
RGB	rgb(54, 67, 187)
HSL	hsl(234, 55%, 47%)
HSV	hsv(234, 71%, 73%)
CMYK	cmyk(71.1%, 64.2%, 0%, 26.7%)
CIE-LAB	lab(34.77, 35.39, -64.64)
CIE-LCH	lch(34.77, 73.69, 298.70°)
OKLab	oklab(45.19% 0.0056 -0.1867)
OKLCH	oklch(45.19% 0.187 271.7)
XYZ	xyz(12.4951, 8.3852, 47.9641)
Luminance	0.0839 (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

#3643BB #BBAE36

analogous

#3686BB #3643BB #6B36BB

triadic

#3643BB #BB3643 #43BB36

tetradic

#3643BB #BB3686 #BBAE36 #36BB6B

square

#3643BB #BB3686 #BBAE36 #36BB6B

split-complementary

#3643BB #BB6B36 #86BB36

monochromatic

#1B215C #28328C #3643BB #5E69D0 #8D95DE

Accessibility & contrast

On white

7.84

#3643BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#3643BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3643BB

7.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3643BB	#FFFFFF	#000000	##FFFFFF
##3643BB	1.00	7.84	2.68	7.84
#FFFFFF	7.84	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3643bb;
/* rgb */ color: rgb(54, 67, 187);
/* oklch */ color: oklch(45.2% 0.187 271.7);

Tailwind

colors: {
  custom: {
    50: '#7f77d0',
    500: '#3643bb',
    950: '#000000',
  },
}

SCSS

$custom: #3643bb;
$custom-light: #7f77d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3643bb",
  "rgb": {
    "r": 54,
    "g": 67,
    "b": 187
  },
  "hsl": {
    "h": 234.135,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45189,
    "c": 0.1868,
    "h": 271.7
  },
  "luminance": 0.08386
}

Semantic roles & 50–950 ramp

primary

#3643BB

secondary

#C9C284

accent

#D049DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3643BB

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

Preview Lab → · Contrast checker → · Palette generator →