#366CD3#366CD3

#366CD3 is a mid, vivid blue. Relative luminance 0.162; OKLCH L 55.1% C 0.169 H 261.8°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#366CD3
RGB	rgb(54, 108, 211)
HSL	hsl(219, 64%, 52%)
HSV	hsv(219, 74%, 83%)
CMYK	cmyk(74.4%, 48.8%, 0%, 17.3%)
CIE-LAB	lab(47.25, 17.86, -58.28)
CIE-LCH	lch(47.25, 60.95, 287.03°)
OKLab	oklab(55.12% -0.0243 -0.1674)
OKLCH	oklch(55.12% 0.169 261.8)
XYZ	xyz(18.6375, 16.2105, 63.7621)
Luminance	0.1621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CD3 #D39D36

analogous

#36BBD3 #366CD3 #4F36D3

triadic

#366CD3 #D3366C #6CD336

tetradic

#366CD3 #D336BB #D39D36 #36D34F

square

#366CD3 #D336BB #D39D36 #36D34F

split-complementary

#366CD3 #D34F36 #BBD336

monochromatic

#1A3975 #2552A7 #366CD3 #6891DE #9AB5E9

Accessibility & contrast

On white

4.95

#366CD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#366CD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CD3

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CD3	#FFFFFF	#000000	##FFFFFF
##366CD3	1.00	4.95	4.24	4.95
#FFFFFF	4.95	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3078D7

Deuteranopia (green-blind)

#0069D1

Tritanopia (blue-blind)

#008595

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #366cd3;
/* rgb */ color: rgb(54, 108, 211);
/* oklch */ color: oklch(55.1% 0.169 261.8);

Tailwind

colors: {
  custom: {
    50: '#8295e1',
    500: '#366cd3',
    950: '#000000',
  },
}

SCSS

$custom: #366cd3;
$custom-light: #8295e1;
$custom-dark: #000000;

JSON

{
  "hex": "#366cd3",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 211
  },
  "hsl": {
    "h": 219.363,
    "s": 64.082,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55122,
    "c": 0.16919,
    "h": 261.8
  },
  "luminance": 0.16213
}

Semantic roles & 50–950 ramp

primary

#366CD3

secondary

#D5BD90

accent

#AE41E7

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366CD3

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

Preview Lab → · Contrast checker → · Palette generator →