#3665CC#3665CC

#3665CC is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.2% C 0.168 H 263.3°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3665CC
RGB	rgb(54, 101, 204)
HSL	hsl(221, 60%, 51%)
HSV	hsv(221, 74%, 80%)
CMYK	cmyk(73.5%, 50.5%, 0%, 20%)
CIE-LAB	lab(44.87, 19.73, -58.11)
CIE-LCH	lch(44.87, 61.36, 288.75°)
OKLab	oklab(53.16% -0.0195 -0.1671)
OKLCH	oklch(53.16% 0.168 263.3)
XYZ	xyz(17.0702, 14.4494, 59.0044)
Luminance	0.1445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665CC #CC9D36

analogous

#36B0CC #3665CC #5236CC

triadic

#3665CC #CC3665 #65CC36

tetradic

#3665CC #CC36B0 #CC9D36 #36CC52

square

#3665CC #CC36B0 #CC9D36 #36CC52

split-complementary

#3665CC #CC5236 #B0CC36

monochromatic

#1B356C #284D9D #3665CC #678AD8 #98B0E5

Accessibility & contrast

On white

5.40

#3665CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#3665CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665CC

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665CC	#FFFFFF	#000000	##FFFFFF
##3665CC	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2571D0

Deuteranopia (green-blind)

#0064CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3665cc;
/* rgb */ color: rgb(54, 101, 204);
/* oklch */ color: oklch(53.2% 0.168 263.3);

Tailwind

colors: {
  custom: {
    50: '#8190dc',
    500: '#3665cc',
    950: '#000000',
  },
}

SCSS

$custom: #3665cc;
$custom-light: #8190dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3665cc",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 204
  },
  "hsl": {
    "h": 221.2,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.53157,
    "c": 0.1682,
    "h": 263.3
  },
  "luminance": 0.14451
}

Semantic roles & 50–950 ramp

primary

#3665CC

secondary

#D0BB8E

accent

#B145E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3665CC

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

Preview Lab → · Contrast checker → · Palette generator →