#3666C2#3666C2

#3666C2 is a mid, vivid blue. Relative luminance 0.142; OKLCH L 52.7% C 0.153 H 261.9°. Best body text is #FFFFFF at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#3666C2
RGB	rgb(54, 102, 194)
HSL	hsl(219, 56%, 49%)
HSV	hsv(219, 72%, 76%)
CMYK	cmyk(72.2%, 47.4%, 0%, 23.9%)
CIE-LAB	lab(44.49, 15.38, -52.96)
CIE-LCH	lch(44.49, 55.14, 286.20°)
OKLab	oklab(52.66% -0.0217 -0.1519)
OKLCH	oklch(52.66% 0.153 261.9)
XYZ	xyz(16.0068, 14.1803, 52.9220)
Luminance	0.1418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3666C2 #C29236

analogous

#36ACC2 #3666C2 #4C36C2

triadic

#3666C2 #C23666 #66C236

tetradic

#3666C2 #C236AC #C29236 #36C24C

square

#3666C2 #C236AC #C29236 #36C24C

split-complementary

#3666C2 #C24C36 #ACC236

monochromatic

#1B3462 #294D92 #3666C2 #6289D3 #92ADE1

Accessibility & contrast

On white

5.47

#3666C2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.84

#3666C2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3666C2

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3666C2	#FFFFFF	#000000	##FFFFFF
##3666C2	1.00	5.47	3.84	5.47
#FFFFFF	5.47	1.00	21.00	1.00
#000000	3.84	21.00	1.00	21.00
##FFFFFF	5.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3470C5

Deuteranopia (green-blind)

#0F63C0

Tritanopia (blue-blind)

#007C8A

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3666c2;
/* rgb */ color: rgb(54, 102, 194);
/* oklch */ color: oklch(52.7% 0.153 261.9);

Tailwind

colors: {
  custom: {
    50: '#7f91d5',
    500: '#3666c2',
    950: '#000000',
  },
}

SCSS

$custom: #3666c2;
$custom-light: #7f91d5;
$custom-dark: #000000;

JSON

{
  "hex": "#3666c2",
  "rgb": {
    "r": 54,
    "g": 102,
    "b": 194
  },
  "hsl": {
    "h": 219.429,
    "s": 56.452,
    "l": 48.627
  },
  "oklch": {
    "l": 0.52656,
    "c": 0.15343,
    "h": 261.9
  },
  "luminance": 0.14182
}

Semantic roles & 50–950 ramp

primary

#3666C2

secondary

#CCB488

accent

#AC48E0

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3666C2

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

Preview Lab → · Contrast checker → · Palette generator →