#3633BB#3633BB

#3633BB is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.6% C 0.204 H 274.4°. Best body text is #FFFFFF at 8.94:1 contrast (WCAG AA passes).

Color values

HEX	#3633BB
RGB	rgb(54, 51, 187)
HSL	hsl(241, 57%, 47%)
HSV	hsv(241, 73%, 73%)
CMYK	cmyk(71.1%, 72.7%, 0%, 26.7%)
CIE-LAB	lab(31.20, 45.06, -70.50)
CIE-LCH	lch(31.20, 83.67, 302.58°)
OKLab	oklab(42.61% 0.0156 -0.2039)
OKLCH	oklch(42.61% 0.204 274.4)
XYZ	xyz(11.6718, 6.7386, 47.6897)
Luminance	0.0674 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.82

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3633BB #B8BB33

analogous

#3374BB #3633BB #7A33BB

triadic

#3633BB #BB3633 #33BB36

tetradic

#3633BB #BB3374 #B8BB33 #33BB7A

square

#3633BB #BB3374 #B8BB33 #33BB7A

split-complementary

#3633BB #BB7A33 #74BB33

monochromatic

#1A195B #28268B #3633BB #5C59D2 #8B89DF

Accessibility & contrast

On white

8.94

#3633BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3633BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3633BB

8.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3633BB	#FFFFFF	#000000	##FFFFFF
##3633BB	1.00	8.94	2.35	8.94
#FFFFFF	8.94	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BF

Deuteranopia (green-blind)

#0043B9

Tritanopia (blue-blind)

#005A74

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3633bb;
/* rgb */ color: rgb(54, 51, 187);
/* oklch */ color: oklch(42.6% 0.204 274.4);

Tailwind

colors: {
  custom: {
    50: '#816cd1',
    500: '#3633bb',
    950: '#000000',
  },
}

SCSS

$custom: #3633bb;
$custom-light: #816cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3633bb",
  "rgb": {
    "r": 54,
    "g": 51,
    "b": 187
  },
  "hsl": {
    "h": 241.324,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.42609,
    "c": 0.20445,
    "h": 274.4
  },
  "luminance": 0.0674
}

Semantic roles & 50–950 ramp

primary

#3633BB

secondary

#C7C981

accent

#E047DD

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3633BB

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

Preview Lab → · Contrast checker → · Palette generator →