#366CC5#366CC5

#366CC5 is a mid, vivid blue. Relative luminance 0.155; OKLCH L 54.2% C 0.150 H 259.9°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#366CC5
RGB	rgb(54, 108, 197)
HSL	hsl(217, 57%, 49%)
HSV	hsv(217, 73%, 77%)
CMYK	cmyk(72.6%, 45.2%, 0%, 22.7%)
CIE-LAB	lab(46.36, 12.67, -51.68)
CIE-LCH	lch(46.36, 53.21, 283.78°)
OKLab	oklab(54.16% -0.0264 -0.148)
OKLCH	oklch(54.16% 0.15 259.9)
XYZ	xyz(16.9583, 15.5388, 54.9180)
Luminance	0.1554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CC5 #C58F36

analogous

#36B4C5 #366CC5 #4836C5

triadic

#366CC5 #C5366C #6CC536

tetradic

#366CC5 #C536B4 #C58F36 #36C548

square

#366CC5 #C536B4 #C58F36 #36C548

split-complementary

#366CC5 #C54836 #B4C536

monochromatic

#1C3765 #295295 #366CC5 #648ED4 #94B1E2

Accessibility & contrast

On white

5.11

#366CC5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#366CC5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CC5

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CC5	#FFFFFF	#000000	##FFFFFF
##366CC5	1.00	5.11	4.11	5.11
#FFFFFF	5.11	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F75C8

Deuteranopia (green-blind)

#2168C3

Tritanopia (blue-blind)

#00818F

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #366cc5;
/* rgb */ color: rgb(54, 108, 197);
/* oklch */ color: oklch(54.2% 0.150 259.9);

Tailwind

colors: {
  custom: {
    50: '#7f95d7',
    500: '#366cc5',
    950: '#000000',
  },
}

SCSS

$custom: #366cc5;
$custom-light: #7f95d7;
$custom-dark: #000000;

JSON

{
  "hex": "#366cc5",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 197
  },
  "hsl": {
    "h": 217.343,
    "s": 56.972,
    "l": 49.216
  },
  "oklch": {
    "l": 0.54157,
    "c": 0.15037,
    "h": 259.9
  },
  "luminance": 0.15541
}

Semantic roles & 50–950 ramp

primary

#366CC5

secondary

#CDB48A

accent

#A748E0

background

#F8F9FD

surface

#F0F1FA

border

#CBCBD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #366CC5

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

Preview Lab → · Contrast checker → · Palette generator →