#366CD1#366CD1

#366CD1 is a mid, vivid blue. Relative luminance 0.161; OKLCH L 55.0% C 0.167 H 261.5°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#366CD1
RGB	rgb(54, 108, 209)
HSL	hsl(219, 63%, 52%)
HSV	hsv(219, 74%, 82%)
CMYK	cmyk(74.2%, 48.3%, 0%, 18%)
CIE-LAB	lab(47.12, 17.12, -57.34)
CIE-LCH	lch(47.12, 59.84, 286.62°)
OKLab	oklab(54.98% -0.0245 -0.1647)
OKLCH	oklch(54.98% 0.167 261.5)
XYZ	xyz(18.3884, 16.1108, 62.4498)
Luminance	0.1611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CD1 #D19B36

analogous

#36B9D1 #366CD1 #4E36D1

triadic

#366CD1 #D1366C #6CD136

tetradic

#366CD1 #D136B9 #D19B36 #36D14E

square

#366CD1 #D136B9 #D19B36 #36D14E

split-complementary

#366CD1 #D14E36 #B9D136

monochromatic

#1A3972 #2652A4 #366CD1 #6890DC #9AB5E8

Accessibility & contrast

On white

4.97

#366CD1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#366CD1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CD1

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CD1	#FFFFFF	#000000	##FFFFFF
##366CD1	1.00	4.97	4.22	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3377D5

Deuteranopia (green-blind)

#0069CF

Tritanopia (blue-blind)

#008494

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #366cd1;
/* rgb */ color: rgb(54, 108, 209);
/* oklch */ color: oklch(55.0% 0.167 261.5);

Tailwind

colors: {
  custom: {
    50: '#8295e0',
    500: '#366cd1',
    950: '#000000',
  },
}

SCSS

$custom: #366cd1;
$custom-light: #8295e0;
$custom-dark: #000000;

JSON

{
  "hex": "#366cd1",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 209
  },
  "hsl": {
    "h": 219.097,
    "s": 62.753,
    "l": 51.569
  },
  "oklch": {
    "l": 0.54981,
    "c": 0.16652,
    "h": 261.5
  },
  "luminance": 0.16113
}

Semantic roles & 50–950 ramp

primary

#366CD1

secondary

#D3BC8F

accent

#AD42E6

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366CD1

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

Preview Lab → · Contrast checker → · Palette generator →