#3661BC#3661BC

#3661BC is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.2% C 0.151 H 263.1°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#3661BC
RGB	rgb(54, 97, 188)
HSL	hsl(221, 55%, 47%)
HSV	hsv(221, 71%, 74%)
CMYK	cmyk(71.3%, 48.4%, 0%, 26.3%)
CIE-LAB	lab(42.71, 16.37, -52.34)
CIE-LCH	lch(42.71, 54.84, 287.37°)
OKLab	oklab(51.17% -0.0182 -0.1502)
OKLCH	oklch(51.17% 0.151 263.1)
XYZ	xyz(14.8699, 12.9629, 49.2856)
Luminance	0.1296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3661BC #BC9136

analogous

#36A4BC #3661BC #4E36BC

triadic

#3661BC #BC3661 #61BC36

tetradic

#3661BC #BC36A4 #BC9136 #36BC4E

square

#3661BC #BC36A4 #BC9136 #36BC4E

split-complementary

#3661BC #BC4E36 #A4BC36

monochromatic

#1B305D #28488C #3661BC #5E83D1 #8EA8DF

Accessibility & contrast

On white

5.85

#3661BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#3661BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3661BC

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3661BC	#FFFFFF	#000000	##FFFFFF
##3661BC	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F6BBF

Deuteranopia (green-blind)

#065FBA

Tritanopia (blue-blind)

#007685

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3661bc;
/* rgb */ color: rgb(54, 97, 188);
/* oklch */ color: oklch(51.2% 0.151 263.1);

Tailwind

colors: {
  custom: {
    50: '#7e8dd1',
    500: '#3661bc',
    950: '#000000',
  },
}

SCSS

$custom: #3661bc;
$custom-light: #7e8dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3661bc",
  "rgb": {
    "r": 54,
    "g": 97,
    "b": 188
  },
  "hsl": {
    "h": 220.746,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.51166,
    "c": 0.15127,
    "h": 263.1
  },
  "luminance": 0.12964
}

Semantic roles & 50–950 ramp

primary

#3661BC

secondary

#C9B385

accent

#AF49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3661BC

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

Preview Lab → · Contrast checker → · Palette generator →