#3766BC#3766BC

#3766BC is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.3% C 0.145 H 261.3°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3766BC
RGB	rgb(55, 102, 188)
HSL	hsl(219, 55%, 48%)
HSV	hsv(219, 71%, 74%)
CMYK	cmyk(70.7%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(44.15, 13.31, -50.02)
CIE-LCH	lch(44.15, 51.76, 284.90°)
OKLab	oklab(52.29% -0.0219 -0.1432)
OKLCH	oklch(52.29% 0.145 261.3)
XYZ	xyz(15.4008, 13.9442, 49.4471)
Luminance	0.1395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766BC #BC8D37

analogous

#37A9BC #3766BC #4A37BC

triadic

#3766BC #BC3766 #66BC37

tetradic

#3766BC #BC37A9 #BC8D37 #37BC4A

square

#3766BC #BC37A9 #BC8D37 #37BC4A

split-complementary

#3766BC #BC4A37 #A9BC37

monochromatic

#1B335D #294C8D #3766BC #6088D0 #8FABDE

Accessibility & contrast

On white

5.54

#3766BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#3766BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766BC

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766BC	#FFFFFF	#000000	##FFFFFF
##3766BC	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6FBF

Deuteranopia (green-blind)

#1F63BA

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3766bc;
/* rgb */ color: rgb(55, 102, 188);
/* oklch */ color: oklch(52.3% 0.145 261.3);

Tailwind

colors: {
  custom: {
    50: '#7e91d1',
    500: '#3766bc',
    950: '#000000',
  },
}

SCSS

$custom: #3766bc;
$custom-light: #7e91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3766bc",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 218.797,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.52287,
    "c": 0.14489,
    "h": 261.3
  },
  "luminance": 0.13946
}

Semantic roles & 50–950 ramp

primary

#3766BC

secondary

#C9B186

accent

#AA4ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3766BC

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

Preview Lab → · Contrast checker → · Palette generator →