#3661CC#3661CC

#3661CC is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.3% C 0.173 H 264.6°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3661CC
RGB	rgb(54, 97, 204)
HSL	hsl(223, 60%, 51%)
HSV	hsv(223, 74%, 80%)
CMYK	cmyk(73.5%, 52.5%, 0%, 20%)
CIE-LAB	lab(43.79, 22.29, -59.86)
CIE-LCH	lch(43.79, 63.88, 290.43°)
OKLab	oklab(52.33% -0.0163 -0.1723)
OKLCH	oklch(52.33% 0.173 264.6)
XYZ	xyz(16.6912, 13.6915, 58.8781)
Luminance	0.1369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661CC #CCA136

analogous

#36ACCC #3661CC #5636CC

triadic

#3661CC #CC3661 #61CC36

tetradic

#3661CC #CC36AC #CCA136 #36CC56

square

#3661CC #CC36AC #CCA136 #36CC56

split-complementary

#3661CC #CC5636 #ACCC36

monochromatic

#1B336C #28499D #3661CC #6787D8 #98AEE5

Accessibility & contrast

On white

5.62

#3661CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#3661CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661CC

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661CC	#FFFFFF	#000000	##FFFFFF
##3661CC	1.00	5.62	3.74	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#156FD0

Deuteranopia (green-blind)

#0061CA

Tritanopia (blue-blind)

#007B8D

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3661cc;
/* rgb */ color: rgb(54, 97, 204);
/* oklch */ color: oklch(52.3% 0.173 264.6);

Tailwind

colors: {
  custom: {
    50: '#818ddc',
    500: '#3661cc',
    950: '#000000',
  },
}

SCSS

$custom: #3661cc;
$custom-light: #818ddc;
$custom-dark: #000000;

JSON

{
  "hex": "#3661cc",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 204
  },
  "hsl": {
    "h": 222.8,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.52333,
    "c": 0.17306,
    "h": 264.6
  },
  "luminance": 0.13693
}

Semantic roles & 50–950 ramp

primary

#3661CC

secondary

#D0BD8E

accent

#B645E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3661CC

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

Preview Lab → · Contrast checker → · Palette generator →