#3665BB#3665BB

#3665BB is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.0% C 0.145 H 261.3°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3665BB
RGB	rgb(54, 101, 187)
HSL	hsl(219, 55%, 47%)
HSV	hsv(219, 71%, 73%)
CMYK	cmyk(71.1%, 46%, 0%, 26.7%)
CIE-LAB	lab(43.77, 13.43, -50.06)
CIE-LCH	lch(43.77, 51.83, 285.02°)
OKLab	oklab(51.96% -0.0219 -0.1434)
OKLCH	oklch(51.96% 0.145 261.3)
XYZ	xyz(15.1414, 13.6779, 48.8462)
Luminance	0.1368 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665BB #BB8C36

analogous

#36A8BB #3665BB #4936BB

triadic

#3665BB #BB3665 #65BB36

tetradic

#3665BB #BB36A8 #BB8C36 #36BB49

square

#3665BB #BB36A8 #BB8C36 #36BB49

split-complementary

#3665BB #BB4936 #A8BB36

monochromatic

#1B325C #284B8C #3665BB #5E86D0 #8DAADE

Accessibility & contrast

On white

5.62

#3665BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#3665BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665BB

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665BB	#FFFFFF	#000000	##FFFFFF
##3665BB	1.00	5.62	3.74	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396EBE

Deuteranopia (green-blind)

#1D62B9

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3665bb;
/* rgb */ color: rgb(54, 101, 187);
/* oklch */ color: oklch(52.0% 0.145 261.3);

Tailwind

colors: {
  custom: {
    50: '#7d90d0',
    500: '#3665bb',
    950: '#000000',
  },
}

SCSS

$custom: #3665bb;
$custom-light: #7d90d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3665bb",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 187
  },
  "hsl": {
    "h": 218.797,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.51959,
    "c": 0.14504,
    "h": 261.3
  },
  "luminance": 0.13679
}

Semantic roles & 50–950 ramp

primary

#3665BB

secondary

#C9B084

accent

#AA49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3665BB

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

Preview Lab → · Contrast checker → · Palette generator →