#3766B9#3766B9

#3766B9 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.1% C 0.141 H 260.8°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#3766B9
RGB	rgb(55, 102, 185)
HSL	hsl(218, 54%, 47%)
HSV	hsv(218, 70%, 73%)
CMYK	cmyk(70.3%, 44.9%, 0%, 27.5%)
CIE-LAB	lab(43.97, 12.20, -48.57)
CIE-LCH	lch(43.97, 50.08, 284.10°)
OKLab	oklab(52.09% -0.0224 -0.139)
OKLCH	oklch(52.09% 0.141 260.8)
XYZ	xyz(15.0807, 13.8162, 47.7615)
Luminance	0.1382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766B9 #B98A37

analogous

#37A7B9 #3766B9 #4937B9

triadic

#3766B9 #B93766 #66B937

tetradic

#3766B9 #B937A7 #B98A37 #37B949

square

#3766B9 #B937A7 #B98A37 #37B949

split-complementary

#3766B9 #B94937 #A7B937

monochromatic

#1B325B #294C8A #3766B9 #5E87CF #8DAADD

Accessibility & contrast

On white

5.58

#3766B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#3766B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766B9

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766B9	#FFFFFF	#000000	##FFFFFF
##3766B9	1.00	5.58	3.76	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D6EBC

Deuteranopia (green-blind)

#2462B7

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3766b9;
/* rgb */ color: rgb(55, 102, 185);
/* oklch */ color: oklch(52.1% 0.141 260.8);

Tailwind

colors: {
  custom: {
    50: '#7d91ce',
    500: '#3766b9',
    950: '#000000',
  },
}

SCSS

$custom: #3766b9;
$custom-light: #7d91ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3766b9",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 185
  },
  "hsl": {
    "h": 218.308,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.52085,
    "c": 0.14076,
    "h": 260.8
  },
  "luminance": 0.13818
}

Semantic roles & 50–950 ramp

primary

#3766B9

secondary

#C8AF84

accent

#A84ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3766B9

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

Preview Lab → · Contrast checker → · Palette generator →