#3766CB#3766CB

#3766CB is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.3% C 0.165 H 263.2°. Best body text is #FFFFFF at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#3766CB
RGB	rgb(55, 102, 203)
HSL	hsl(221, 59%, 51%)
HSV	hsv(221, 73%, 80%)
CMYK	cmyk(72.9%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(45.12, 18.85, -57.13)
CIE-LCH	lch(45.12, 60.16, 288.26°)
OKLab	oklab(53.33% -0.0197 -0.1642)
OKLCH	oklch(53.33% 0.165 263.2)
XYZ	xyz(17.1026, 14.6249, 58.4099)
Luminance	0.1463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3766CB #CB9C37

analogous

#37B0CB #3766CB #5237CB

triadic

#3766CB #CB3766 #66CB37

tetradic

#3766CB #CB37B0 #CB9C37 #37CB52

square

#3766CB #CB37B0 #CB9C37 #37CB52

split-complementary

#3766CB #CB5237 #B0CB37

monochromatic

#1C356C #294D9C #3766CB #688BD8 #98B0E4

Accessibility & contrast

On white

5.35

#3766CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.93

#3766CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3766CB

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3766CB	#FFFFFF	#000000	##FFFFFF
##3766CB	1.00	5.35	3.93	5.35
#FFFFFF	5.35	1.00	21.00	1.00
#000000	3.93	21.00	1.00	21.00
##FFFFFF	5.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A72CF

Deuteranopia (green-blind)

#0064C9

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3766cb;
/* rgb */ color: rgb(55, 102, 203);
/* oklch */ color: oklch(53.3% 0.165 263.2);

Tailwind

colors: {
  custom: {
    50: '#8191db',
    500: '#3766cb',
    950: '#000000',
  },
}

SCSS

$custom: #3766cb;
$custom-light: #8191db;
$custom-dark: #000000;

JSON

{
  "hex": "#3766cb",
  "rgb": {
    "r": 55,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 220.946,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.53334,
    "c": 0.16534,
    "h": 263.2
  },
  "luminance": 0.14627
}

Semantic roles & 50–950 ramp

primary

#3766CB

secondary

#D0BB8E

accent

#B046E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3766CB

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

Preview Lab → · Contrast checker → · Palette generator →