#3665B9#3665B9

#3665B9 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.8% C 0.142 H 261.0°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#3665B9
RGB	rgb(54, 101, 185)
HSL	hsl(218, 55%, 47%)
HSV	hsv(218, 71%, 73%)
CMYK	cmyk(70.8%, 45.4%, 0%, 27.5%)
CIE-LAB	lab(43.64, 12.69, -49.09)
CIE-LCH	lch(43.64, 50.71, 284.49°)
OKLab	oklab(51.82% -0.0222 -0.1405)
OKLCH	oklch(51.82% 0.142 261)
XYZ	xyz(14.9288, 13.5928, 47.7264)
Luminance	0.1359 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665B9 #B98A36

analogous

#36A7B9 #3665B9 #4836B9

triadic

#3665B9 #B93665 #65B936

tetradic

#3665B9 #B936A7 #B98A36 #36B948

square

#3665B9 #B936A7 #B98A36 #36B948

split-complementary

#3665B9 #B94836 #A7B936

monochromatic

#1A315A #284B8A #3665B9 #5D86D0 #8CA9DD

Accessibility & contrast

On white

5.65

#3665B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3665B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665B9

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665B9	#FFFFFF	#000000	##FFFFFF
##3665B9	1.00	5.65	3.72	5.65
#FFFFFF	5.65	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6EBC

Deuteranopia (green-blind)

#2162B7

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3665b9;
/* rgb */ color: rgb(54, 101, 185);
/* oklch */ color: oklch(51.8% 0.142 261.0);

Tailwind

colors: {
  custom: {
    50: '#7d90ce',
    500: '#3665b9',
    950: '#000000',
  },
}

SCSS

$custom: #3665b9;
$custom-light: #7d90ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3665b9",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 185
  },
  "hsl": {
    "h": 218.473,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.51823,
    "c": 0.14229,
    "h": 261
  },
  "luminance": 0.13594
}

Semantic roles & 50–950 ramp

primary

#3665B9

secondary

#C8AF83

accent

#A94ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3665B9

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

Preview Lab → · Contrast checker → · Palette generator →