#3666CA#3666CA

#3666CA is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.2% C 0.164 H 262.8°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#3666CA
RGB	rgb(54, 102, 202)
HSL	hsl(221, 58%, 50%)
HSV	hsv(221, 73%, 79%)
CMYK	cmyk(73.3%, 49.5%, 0%, 20.8%)
CIE-LAB	lab(45.01, 18.35, -56.73)
CIE-LCH	lch(45.01, 59.62, 287.92°)
OKLab	oklab(53.22% -0.0205 -0.163)
OKLCH	oklch(53.22% 0.164 262.8)
XYZ	xyz(16.9296, 14.5494, 57.7818)
Luminance	0.1455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3666CA #CA9A36

analogous

#36B0CA #3666CA #5036CA

triadic

#3666CA #CA3666 #66CA36

tetradic

#3666CA #CA36B0 #CA9A36 #36CA50

square

#3666CA #CA36B0 #CA9A36 #36CA50

split-complementary

#3666CA #CA5036 #B0CA36

monochromatic

#1C356A #294D9A #3666CA #668BD7 #97B0E4

Accessibility & contrast

On white

5.37

#3666CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#3666CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3666CA

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3666CA	#FFFFFF	#000000	##FFFFFF
##3666CA	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B72CE

Deuteranopia (green-blind)

#0064C8

Tritanopia (blue-blind)

#007E8E

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3666ca;
/* rgb */ color: rgb(54, 102, 202);
/* oklch */ color: oklch(53.2% 0.164 262.8);

Tailwind

colors: {
  custom: {
    50: '#8091db',
    500: '#3666ca',
    950: '#000000',
  },
}

SCSS

$custom: #3666ca;
$custom-light: #8091db;
$custom-dark: #000000;

JSON

{
  "hex": "#3666ca",
  "rgb": {
    "r": 54,
    "g": 102,
    "b": 202
  },
  "hsl": {
    "h": 220.541,
    "s": 58.268,
    "l": 50.196
  },
  "oklch": {
    "l": 0.53221,
    "c": 0.16429,
    "h": 262.8
  },
  "luminance": 0.14551
}

Semantic roles & 50–950 ramp

primary

#3666CA

secondary

#CFBA8D

accent

#AF46E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3666CA

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

Preview Lab → · Contrast checker → · Palette generator →