#366CC4#366CC4

#366CC4 is a mid, vivid blue. Relative luminance 0.155; OKLCH L 54.1% C 0.149 H 259.7°. Best body text is #FFFFFF at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#366CC4
RGB	rgb(54, 108, 196)
HSL	hsl(217, 57%, 49%)
HSV	hsv(217, 72%, 77%)
CMYK	cmyk(72.4%, 44.9%, 0%, 23.1%)
CIE-LAB	lab(46.30, 12.30, -51.20)
CIE-LCH	lch(46.30, 52.66, 283.51°)
OKLab	oklab(54.09% -0.0266 -0.1466)
OKLCH	oklch(54.09% 0.149 259.7)
XYZ	xyz(16.8441, 15.4931, 54.3166)
Luminance	0.1550 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CC4 #C48E36

analogous

#36B3C4 #366CC4 #4736C4

triadic

#366CC4 #C4366C #6CC436

tetradic

#366CC4 #C436B3 #C48E36 #36C447

square

#366CC4 #C436B3 #C48E36 #36C447

split-complementary

#366CC4 #C44736 #B3C436

monochromatic

#1C3764 #295294 #366CC4 #638ED4 #93B1E1

Accessibility & contrast

On white

5.12

#366CC4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#366CC4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CC4

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CC4	#FFFFFF	#000000	##FFFFFF
##366CC4	1.00	5.12	4.10	5.12
#FFFFFF	5.12	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F75C7

Deuteranopia (green-blind)

#2368C2

Tritanopia (blue-blind)

#00818E

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #366cc4;
/* rgb */ color: rgb(54, 108, 196);
/* oklch */ color: oklch(54.1% 0.149 259.7);

Tailwind

colors: {
  custom: {
    50: '#7f95d6',
    500: '#366cc4',
    950: '#000000',
  },
}

SCSS

$custom: #366cc4;
$custom-light: #7f95d6;
$custom-dark: #000000;

JSON

{
  "hex": "#366cc4",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 196
  },
  "hsl": {
    "h": 217.183,
    "s": 56.8,
    "l": 49.02
  },
  "oklch": {
    "l": 0.5409,
    "c": 0.14902,
    "h": 259.7
  },
  "luminance": 0.15495
}

Semantic roles & 50–950 ramp

primary

#366CC4

secondary

#CCB389

accent

#A648E0

background

#F8F9FD

surface

#EFF1FA

border

#CACBD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #366CC4

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

Preview Lab → · Contrast checker → · Palette generator →