#3660BB#3660BB

#3660BB is a mid, vivid blue. Relative luminance 0.127; OKLCH L 50.9% C 0.151 H 263.4°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#3660BB
RGB	rgb(54, 96, 187)
HSL	hsl(221, 55%, 47%)
HSV	hsv(221, 71%, 73%)
CMYK	cmyk(71.1%, 48.7%, 0%, 26.7%)
CIE-LAB	lab(42.36, 16.64, -52.31)
CIE-LCH	lch(42.36, 54.90, 287.65°)
OKLab	oklab(50.88% -0.0174 -0.1501)
OKLCH	oklch(50.88% 0.151 263.4)
XYZ	xyz(14.6707, 12.7363, 48.6893)
Luminance	0.1274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3660BB #BB9136

analogous

#36A2BB #3660BB #4F36BB

triadic

#3660BB #BB3660 #60BB36

tetradic

#3660BB #BB36A2 #BB9136 #36BB4F

square

#3660BB #BB36A2 #BB9136 #36BB4F

split-complementary

#3660BB #BB4F36 #A2BB36

monochromatic

#1B2F5C #28488C #3660BB #5E82D0 #8DA7DE

Accessibility & contrast

On white

5.92

#3660BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3660BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3660BB

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3660BB	#FFFFFF	#000000	##FFFFFF
##3660BB	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E6ABE

Deuteranopia (green-blind)

#035EB9

Tritanopia (blue-blind)

#007584

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3660bb;
/* rgb */ color: rgb(54, 96, 187);
/* oklch */ color: oklch(50.9% 0.151 263.4);

Tailwind

colors: {
  custom: {
    50: '#7d8cd0',
    500: '#3660bb',
    950: '#000000',
  },
}

SCSS

$custom: #3660bb;
$custom-light: #7d8cd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3660bb",
  "rgb": {
    "r": 54,
    "g": 96,
    "b": 187
  },
  "hsl": {
    "h": 221.053,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.50882,
    "c": 0.15111,
    "h": 263.4
  },
  "luminance": 0.12738
}

Semantic roles & 50–950 ramp

primary

#3660BB

secondary

#C9B384

accent

#AF49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3660BB

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

Preview Lab → · Contrast checker → · Palette generator →