#3766B7#3766B7

#3766B7 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 52.0% C 0.138 H 260.5°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3766B7
RGB	rgb(55, 102, 183)
HSL	hsl(218, 54%, 47%)
HSV	hsv(218, 70%, 72%)
CMYK	cmyk(69.9%, 44.3%, 0%, 28.2%)
CIE-LAB	lab(43.85, 11.47, -47.60)
CIE-LCH	lch(43.85, 48.96, 283.54°)
OKLab	oklab(51.95% -0.0228 -0.1361)
OKLCH	oklch(51.95% 0.138 260.5)
XYZ	xyz(14.8711, 13.7323, 46.6574)
Luminance	0.1373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766B7 #B78837

analogous

#37A6B7 #3766B7 #4837B7

triadic

#3766B7 #B73766 #66B737

tetradic

#3766B7 #B737A6 #B78837 #37B748

square

#3766B7 #B737A6 #B78837 #37B748

split-complementary

#3766B7 #B74837 #A6B737

monochromatic

#1B3259 #294C88 #3766B7 #5D87CE #8CAADC

Accessibility & contrast

On white

5.60

#3766B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#3766B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766B7

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766B7	#FFFFFF	#000000	##FFFFFF
##3766B7	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E6EBA

Deuteranopia (green-blind)

#2762B5

Tritanopia (blue-blind)

#007985

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3766b7;
/* rgb */ color: rgb(55, 102, 183);
/* oklch */ color: oklch(52.0% 0.138 260.5);

Tailwind

colors: {
  custom: {
    50: '#7d91cd',
    500: '#3766b7',
    950: '#000000',
  },
}

SCSS

$custom: #3766b7;
$custom-light: #7d91cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3766b7",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 183
  },
  "hsl": {
    "h": 217.969,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.51952,
    "c": 0.13801,
    "h": 260.5
  },
  "luminance": 0.13734
}

Semantic roles & 50–950 ramp

primary

#3766B7

secondary

#C7AE83

accent

#A74BDD

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3766B7

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

Preview Lab → · Contrast checker → · Palette generator →