#3668BB#3668BB

#3668BB is a mid, vivid blue. Relative luminance 0.143; OKLCH L 52.6% C 0.141 H 260.0°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3668BB
RGB	rgb(54, 104, 187)
HSL	hsl(217, 55%, 47%)
HSV	hsv(217, 71%, 73%)
CMYK	cmyk(71.1%, 44.4%, 0%, 26.7%)
CIE-LAB	lab(44.62, 11.52, -48.69)
CIE-LCH	lch(44.62, 50.03, 283.31°)
OKLab	oklab(52.62% -0.0246 -0.1393)
OKLCH	oklch(52.62% 0.141 260)
XYZ	xyz(15.4380, 14.2711, 48.9451)
Luminance	0.1427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3668BB #BB8936

analogous

#36AABB #3668BB #4736BB

triadic

#3668BB #BB3668 #68BB36

tetradic

#3668BB #BB36AA #BB8936 #36BB47

square

#3668BB #BB36AA #BB8936 #36BB47

split-complementary

#3668BB #BB4736 #AABB36

monochromatic

#1B335C #284E8C #3668BB #5E89D0 #8DACDE

Accessibility & contrast

On white

5.45

#3668BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.85

#3668BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3668BB

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3668BB	#FFFFFF	#000000	##FFFFFF
##3668BB	1.00	5.45	3.85	5.45
#FFFFFF	5.45	1.00	21.00	1.00
#000000	3.85	21.00	1.00	21.00
##FFFFFF	5.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F70BE

Deuteranopia (green-blind)

#2664B9

Tritanopia (blue-blind)

#007B88

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3668bb;
/* rgb */ color: rgb(54, 104, 187);
/* oklch */ color: oklch(52.6% 0.141 260.0);

Tailwind

colors: {
  custom: {
    50: '#7d92d0',
    500: '#3668bb',
    950: '#000000',
  },
}

SCSS

$custom: #3668bb;
$custom-light: #7d92d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3668bb",
  "rgb": {
    "r": 54,
    "g": 104,
    "b": 187
  },
  "hsl": {
    "h": 217.444,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.52615,
    "c": 0.14147,
    "h": 260
  },
  "luminance": 0.14273
}

Semantic roles & 50–950 ramp

primary

#3668BB

secondary

#C9AF84

accent

#A649DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3668BB

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

Preview Lab → · Contrast checker → · Palette generator →