#3665CD#3665CD

#3665CD is a mid, vivid blue. Relative luminance 0.145; OKLCH L 53.2% C 0.170 H 263.4°. Best body text is #FFFFFF at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#3665CD
RGB	rgb(54, 101, 205)
HSL	hsl(221, 60%, 51%)
HSV	hsv(221, 74%, 80%)
CMYK	cmyk(73.7%, 50.7%, 0%, 19.6%)
CIE-LAB	lab(44.94, 20.10, -58.57)
CIE-LCH	lch(44.94, 61.92, 288.94°)
OKLab	oklab(53.23% -0.0194 -0.1684)
OKLCH	oklch(53.23% 0.17 263.4)
XYZ	xyz(17.1905, 14.4975, 59.6381)
Luminance	0.1450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665CD #CD9E36

analogous

#36B0CD #3665CD #5336CD

triadic

#3665CD #CD3665 #65CD36

tetradic

#3665CD #CD36B0 #CD9E36 #36CD53

square

#3665CD #CD36B0 #CD9E36 #36CD53

split-complementary

#3665CD #CD5336 #B0CD36

monochromatic

#1B356D #274C9E #3665CD #678BD9 #98B0E5

Accessibility & contrast

On white

5.38

#3665CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.90

#3665CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665CD

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665CD	#FFFFFF	#000000	##FFFFFF
##3665CD	1.00	5.38	3.90	5.38
#FFFFFF	5.38	1.00	21.00	1.00
#000000	3.90	21.00	1.00	21.00
##FFFFFF	5.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2472D1

Deuteranopia (green-blind)

#0064CB

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3665cd;
/* rgb */ color: rgb(54, 101, 205);
/* oklch */ color: oklch(53.2% 0.170 263.4);

Tailwind

colors: {
  custom: {
    50: '#8190dd',
    500: '#3665cd',
    950: '#000000',
  },
}

SCSS

$custom: #3665cd;
$custom-light: #8190dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3665cd",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 205
  },
  "hsl": {
    "h": 221.325,
    "s": 60.159,
    "l": 50.784
  },
  "oklch": {
    "l": 0.5323,
    "c": 0.16955,
    "h": 263.4
  },
  "luminance": 0.14499
}

Semantic roles & 50–950 ramp

primary

#3665CD

secondary

#D1BC8E

accent

#B244E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3665CD

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

Preview Lab → · Contrast checker → · Palette generator →