#366CCB#366CCB

#366CCB is a mid, vivid blue. Relative luminance 0.158; OKLCH L 54.6% C 0.158 H 260.8°. Best body text is #FFFFFF at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#366CCB
RGB	rgb(54, 108, 203)
HSL	hsl(218, 59%, 50%)
HSV	hsv(218, 73%, 80%)
CMYK	cmyk(73.4%, 46.8%, 0%, 20.4%)
CIE-LAB	lab(46.74, 14.89, -54.53)
CIE-LCH	lch(46.74, 56.52, 285.28°)
OKLab	oklab(54.56% -0.0254 -0.1564)
OKLCH	oklch(54.56% 0.158 260.8)
XYZ	xyz(17.6595, 15.8192, 58.6111)
Luminance	0.1582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CCB #CB9536

analogous

#36B6CB #366CCB #4A36CB

triadic

#366CCB #CB366C #6CCB36

tetradic

#366CCB #CB36B6 #CB9536 #36CB4A

square

#366CCB #CB36B6 #CB9536 #36CB4A

split-complementary

#366CCB #CB4A36 #B6CB36

monochromatic

#1C386B #28529C #366CCB #6790D8 #97B3E4

Accessibility & contrast

On white

5.04

#366CCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#366CCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CCB

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CCB	#FFFFFF	#000000	##FFFFFF
##366CCB	1.00	5.04	4.16	5.04
#FFFFFF	5.04	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3976CF

Deuteranopia (green-blind)

#1368C9

Tritanopia (blue-blind)

#008292

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #366ccb;
/* rgb */ color: rgb(54, 108, 203);
/* oklch */ color: oklch(54.6% 0.158 260.8);

Tailwind

colors: {
  custom: {
    50: '#8095db',
    500: '#366ccb',
    950: '#000000',
  },
}

SCSS

$custom: #366ccb;
$custom-light: #8095db;
$custom-dark: #000000;

JSON

{
  "hex": "#366ccb",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 203
  },
  "hsl": {
    "h": 218.255,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.54564,
    "c": 0.15847,
    "h": 260.8
  },
  "luminance": 0.15821
}

Semantic roles & 50–950 ramp

primary

#366CCB

secondary

#D0B88D

accent

#A946E2

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366CCB

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

Preview Lab → · Contrast checker → · Palette generator →