#3766D1#3766D1

#3766D1 is a mid, vivid blue. Relative luminance 0.149; OKLCH L 53.8% C 0.173 H 263.7°. Best body text is #FFFFFF at 5.27:1 contrast (WCAG AA passes).

Color values

HEX	#3766D1
RGB	rgb(55, 102, 209)
HSL	hsl(222, 63%, 52%)
HSV	hsv(222, 74%, 82%)
CMYK	cmyk(73.7%, 51.2%, 0%, 18%)
CIE-LAB	lab(45.52, 21.06, -59.92)
CIE-LCH	lch(45.52, 63.52, 289.37°)
OKLab	oklab(53.77% -0.019 -0.1724)
OKLCH	oklch(53.77% 0.173 263.7)
XYZ	xyz(17.8315, 14.9165, 62.2486)
Luminance	0.1492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766D1 #D1A237

analogous

#37B3D1 #3766D1 #5537D1

triadic

#3766D1 #D13766 #66D137

tetradic

#3766D1 #D137B3 #D1A237 #37D155

square

#3766D1 #D137B3 #D1A237 #37D155

split-complementary

#3766D1 #D15537 #B3D137

monochromatic

#1A3673 #264DA5 #3766D1 #698CDC #9BB2E8

Accessibility & contrast

On white

5.27

#3766D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#3766D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766D1

5.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766D1	#FFFFFF	#000000	##FFFFFF
##3766D1	1.00	5.27	3.98	5.27
#FFFFFF	5.27	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2173D5

Deuteranopia (green-blind)

#0065CF

Tritanopia (blue-blind)

#008092

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3766d1;
/* rgb */ color: rgb(55, 102, 209);
/* oklch */ color: oklch(53.8% 0.173 263.7);

Tailwind

colors: {
  custom: {
    50: '#8291e0',
    500: '#3766d1',
    950: '#000000',
  },
}

SCSS

$custom: #3766d1;
$custom-light: #8291e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3766d1",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 209
  },
  "hsl": {
    "h": 221.688,
    "s": 62.602,
    "l": 51.765
  },
  "oklch": {
    "l": 0.5377,
    "c": 0.17342,
    "h": 263.7
  },
  "luminance": 0.14918
}

Semantic roles & 50–950 ramp

primary

#3766D1

secondary

#D4BF90

accent

#B442E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3766D1

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

Preview Lab → · Contrast checker → · Palette generator →