#3661CA#3661CA

#3661CA is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.2% C 0.170 H 264.4°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#3661CA
RGB	rgb(54, 97, 202)
HSL	hsl(223, 58%, 50%)
HSV	hsv(223, 73%, 79%)
CMYK	cmyk(73.3%, 52%, 0%, 20.8%)
CIE-LAB	lab(43.65, 21.55, -58.93)
CIE-LCH	lch(43.65, 62.75, 290.09°)
OKLab	oklab(52.18% -0.0165 -0.1696)
OKLCH	oklch(52.18% 0.17 264.4)
XYZ	xyz(16.4529, 13.5961, 57.6229)
Luminance	0.1360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661CA #CA9F36

analogous

#36ABCA #3661CA #5536CA

triadic

#3661CA #CA3661 #61CA36

tetradic

#3661CA #CA36AB #CA9F36 #36CA55

square

#3661CA #CA36AB #CA9F36 #36CA55

split-complementary

#3661CA #CA5536 #ABCA36

monochromatic

#1C326A #294A9A #3661CA #6687D7 #97ADE4

Accessibility & contrast

On white

5.65

#3661CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3661CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661CA

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661CA	#FFFFFF	#000000	##FFFFFF
##3661CA	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)

#1A6ECE

Deuteranopia (green-blind)

#0061C8

Tritanopia (blue-blind)

#007A8C

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3661ca;
/* rgb */ color: rgb(54, 97, 202);
/* oklch */ color: oklch(52.2% 0.170 264.4);

Tailwind

colors: {
  custom: {
    50: '#818ddb',
    500: '#3661ca',
    950: '#000000',
  },
}

SCSS

$custom: #3661ca;
$custom-light: #818ddb;
$custom-dark: #000000;

JSON

{
  "hex": "#3661ca",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 202
  },
  "hsl": {
    "h": 222.568,
    "s": 58.268,
    "l": 50.196
  },
  "oklch": {
    "l": 0.52184,
    "c": 0.17036,
    "h": 264.4
  },
  "luminance": 0.13598
}

Semantic roles & 50–950 ramp

primary

#3661CA

secondary

#CFBC8D

accent

#B446E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3661CA

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

Preview Lab → · Contrast checker → · Palette generator →