#366CC3#366CC3

#366CC3 is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.0% C 0.148 H 259.5°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#366CC3
RGB	rgb(54, 108, 195)
HSL	hsl(217, 57%, 49%)
HSV	hsv(217, 72%, 76%)
CMYK	cmyk(72.3%, 44.6%, 0%, 23.5%)
CIE-LAB	lab(46.24, 11.94, -50.72)
CIE-LCH	lch(46.24, 52.11, 283.24°)
OKLab	oklab(54.02% -0.0268 -0.1452)
OKLCH	oklch(54.02% 0.148 259.5)
XYZ	xyz(16.7306, 15.4477, 53.7191)
Luminance	0.1545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CC3 #C38D36

analogous

#36B3C3 #366CC3 #4636C3

triadic

#366CC3 #C3366C #6CC336

tetradic

#366CC3 #C336B3 #C38D36 #36C346

square

#366CC3 #C336B3 #C38D36 #36C346

split-complementary

#366CC3 #C34636 #B3C336

monochromatic

#1B3763 #295193 #366CC3 #638ED4 #92B1E1

Accessibility & contrast

On white

5.13

#366CC3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#366CC3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CC3

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CC3	#FFFFFF	#000000	##FFFFFF
##366CC3	1.00	5.13	4.09	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4075C6

Deuteranopia (green-blind)

#2568C1

Tritanopia (blue-blind)

#00808E

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #366cc3;
/* rgb */ color: rgb(54, 108, 195);
/* oklch */ color: oklch(54.0% 0.148 259.5);

Tailwind

colors: {
  custom: {
    50: '#7f95d6',
    500: '#366cc3',
    950: '#000000',
  },
}

SCSS

$custom: #366cc3;
$custom-light: #7f95d6;
$custom-dark: #000000;

JSON

{
  "hex": "#366cc3",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 195
  },
  "hsl": {
    "h": 217.021,
    "s": 56.627,
    "l": 48.824
  },
  "oklch": {
    "l": 0.54023,
    "c": 0.14767,
    "h": 259.5
  },
  "luminance": 0.1545
}

Semantic roles & 50–950 ramp

primary

#366CC3

secondary

#CCB289

accent

#A648E0

background

#F8F9FD

surface

#EFF1FA

border

#CACBD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #366CC3

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

Preview Lab → · Contrast checker → · Palette generator →