#3664BB#3664BB

#3664BB is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.7% C 0.146 H 261.7°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#3664BB
RGB	rgb(54, 100, 187)
HSL	hsl(219, 55%, 47%)
HSV	hsv(219, 71%, 73%)
CMYK	cmyk(71.1%, 46.5%, 0%, 26.7%)
CIE-LAB	lab(43.48, 14.07, -50.51)
CIE-LCH	lch(43.48, 52.43, 285.57°)
OKLab	oklab(51.74% -0.021 -0.1447)
OKLCH	oklch(51.74% 0.146 261.7)
XYZ	xyz(15.0449, 13.4849, 48.8140)
Luminance	0.1349 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3664BB #BB8D36

analogous

#36A7BB #3664BB #4A36BB

triadic

#3664BB #BB3664 #64BB36

tetradic

#3664BB #BB36A7 #BB8D36 #36BB4A

square

#3664BB #BB36A7 #BB8D36 #36BB4A

split-complementary

#3664BB #BB4A36 #A7BB36

monochromatic

#1B315C #284B8C #3664BB #5E85D0 #8DA9DE

Accessibility & contrast

On white

5.68

#3664BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#3664BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3664BB

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3664BB	#FFFFFF	#000000	##FFFFFF
##3664BB	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376DBE

Deuteranopia (green-blind)

#1961B9

Tritanopia (blue-blind)

#007886

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3664bb;
/* rgb */ color: rgb(54, 100, 187);
/* oklch */ color: oklch(51.7% 0.146 261.7);

Tailwind

colors: {
  custom: {
    50: '#7d8fd0',
    500: '#3664bb',
    950: '#000000',
  },
}

SCSS

$custom: #3664bb;
$custom-light: #7d8fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3664bb",
  "rgb": {
    "r": 54,
    "g": 100,
    "b": 187
  },
  "hsl": {
    "h": 219.248,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.51742,
    "c": 0.14625,
    "h": 261.7
  },
  "luminance": 0.13486
}

Semantic roles & 50–950 ramp

primary

#3664BB

secondary

#C9B184

accent

#AB49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3664BB

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

Preview Lab → · Contrast checker → · Palette generator →