#3660BC#3660BC

#3660BC is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.0% C 0.152 H 263.5°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#3660BC
RGB	rgb(54, 96, 188)
HSL	hsl(221, 55%, 47%)
HSV	hsv(221, 71%, 74%)
CMYK	cmyk(71.3%, 48.9%, 0%, 26.3%)
CIE-LAB	lab(42.43, 17.01, -52.79)
CIE-LCH	lch(42.43, 55.46, 287.86°)
OKLab	oklab(50.95% -0.0173 -0.1515)
OKLCH	oklch(50.95% 0.152 263.5)
XYZ	xyz(14.7781, 12.7793, 49.2550)
Luminance	0.1278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3660BC #BC9236

analogous

#36A3BC #3660BC #4F36BC

triadic

#3660BC #BC3660 #60BC36

tetradic

#3660BC #BC36A3 #BC9236 #36BC4F

square

#3660BC #BC36A3 #BC9236 #36BC4F

split-complementary

#3660BC #BC4F36 #A3BC36

monochromatic

#1B2F5D #28488C #3660BC #5E82D1 #8EA7DF

Accessibility & contrast

On white

5.91

#3660BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3660BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3660BC

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3660BC	#FFFFFF	#000000	##FFFFFF
##3660BC	1.00	5.91	3.56	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D6BBF

Deuteranopia (green-blind)

#005EBA

Tritanopia (blue-blind)

#007685

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3660bc;
/* rgb */ color: rgb(54, 96, 188);
/* oklch */ color: oklch(51.0% 0.152 263.5);

Tailwind

colors: {
  custom: {
    50: '#7e8cd1',
    500: '#3660bc',
    950: '#000000',
  },
}

SCSS

$custom: #3660bc;
$custom-light: #7e8cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3660bc",
  "rgb": {
    "r": 54,
    "g": 96,
    "b": 188
  },
  "hsl": {
    "h": 221.194,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.50953,
    "c": 0.15249,
    "h": 263.5
  },
  "luminance": 0.12781
}

Semantic roles & 50–950 ramp

primary

#3660BC

secondary

#C9B485

accent

#B049DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3660BC

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

Preview Lab → · Contrast checker → · Palette generator →