#3665BC#3665BC

#3665BC is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.0% C 0.146 H 261.5°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#3665BC
RGB	rgb(54, 101, 188)
HSL	hsl(219, 55%, 47%)
HSV	hsv(219, 71%, 74%)
CMYK	cmyk(71.3%, 46.3%, 0%, 26.3%)
CIE-LAB	lab(43.83, 13.80, -50.54)
CIE-LCH	lch(43.83, 52.39, 285.27°)
OKLab	oklab(52.03% -0.0217 -0.1448)
OKLCH	oklch(52.03% 0.146 261.5)
XYZ	xyz(15.2489, 13.7209, 49.4120)
Luminance	0.1372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665BC #BC8D36

analogous

#36A8BC #3665BC #4A36BC

triadic

#3665BC #BC3665 #65BC36

tetradic

#3665BC #BC36A8 #BC8D36 #36BC4A

square

#3665BC #BC36A8 #BC8D36 #36BC4A

split-complementary

#3665BC #BC4A36 #A8BC36

monochromatic

#1B325D #284B8C #3665BC #5E87D1 #8EAADF

Accessibility & contrast

On white

5.61

#3665BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#3665BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665BC

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665BC	#FFFFFF	#000000	##FFFFFF
##3665BC	1.00	5.61	3.74	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#386EBF

Deuteranopia (green-blind)

#1B62BA

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3665bc;
/* rgb */ color: rgb(54, 101, 188);
/* oklch */ color: oklch(52.0% 0.146 261.5);

Tailwind

colors: {
  custom: {
    50: '#7d90d1',
    500: '#3665bc',
    950: '#000000',
  },
}

SCSS

$custom: #3665bc;
$custom-light: #7d90d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3665bc",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 188
  },
  "hsl": {
    "h": 218.955,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.52027,
    "c": 0.14641,
    "h": 261.5
  },
  "luminance": 0.13722
}

Semantic roles & 50–950 ramp

primary

#3665BC

secondary

#C9B185

accent

#AA49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3665BC

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

Preview Lab → · Contrast checker → · Palette generator →