#3766CC#3766CC

#3766CC is a mid, vivid blue. Relative luminance 0.147; OKLCH L 53.4% C 0.167 H 263.3°. Best body text is #FFFFFF at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#3766CC
RGB	rgb(55, 102, 204)
HSL	hsl(221, 59%, 51%)
HSV	hsv(221, 73%, 80%)
CMYK	cmyk(73%, 50%, 0%, 20%)
CIE-LAB	lab(45.18, 19.22, -57.60)
CIE-LCH	lch(45.18, 60.72, 288.45°)
OKLab	oklab(53.41% -0.0195 -0.1655)
OKLCH	oklch(53.41% 0.167 263.3)
XYZ	xyz(17.2221, 14.6727, 59.0395)
Luminance	0.1467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766CC #CC9D37

analogous

#37B0CC #3766CC #5237CC

triadic

#3766CC #CC3766 #66CC37

tetradic

#3766CC #CC37B0 #CC9D37 #37CC52

square

#3766CC #CC37B0 #CC9D37 #37CC52

split-complementary

#3766CC #CC5237 #B0CC37

monochromatic

#1C356D #284D9E #3766CC #688BD8 #99B1E5

Accessibility & contrast

On white

5.34

#3766CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.93

#3766CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766CC

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766CC	#FFFFFF	#000000	##FFFFFF
##3766CC	1.00	5.34	3.93	5.34
#FFFFFF	5.34	1.00	21.00	1.00
#000000	3.93	21.00	1.00	21.00
##FFFFFF	5.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2972D0

Deuteranopia (green-blind)

#0064CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3766cc;
/* rgb */ color: rgb(55, 102, 204);
/* oklch */ color: oklch(53.4% 0.167 263.3);

Tailwind

colors: {
  custom: {
    50: '#8191dc',
    500: '#3766cc',
    950: '#000000',
  },
}

SCSS

$custom: #3766cc;
$custom-light: #8191dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3766cc",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 221.074,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.53406,
    "c": 0.16669,
    "h": 263.3
  },
  "luminance": 0.14675
}

Semantic roles & 50–950 ramp

primary

#3766CC

secondary

#D0BC8E

accent

#B145E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3766CC

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

Preview Lab → · Contrast checker → · Palette generator →