#366FDA#366FDA

#366FDA is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.2% C 0.175 H 261.6°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#366FDA
RGB	rgb(54, 111, 218)
HSL	hsl(219, 69%, 53%)
HSV	hsv(219, 75%, 85%)
CMYK	cmyk(75.2%, 49.1%, 0%, 14.5%)
CIE-LAB	lab(48.53, 18.55, -60.20)
CIE-LCH	lch(48.53, 62.99, 287.12°)
OKLab	oklab(56.25% -0.0257 -0.173)
OKLCH	oklch(56.25% 0.175 261.6)
XYZ	xyz(19.8561, 17.2129, 68.5920)
Luminance	0.1721 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FDA #DAA136

analogous

#36C1DA #366FDA #4F36DA

triadic

#366FDA #DA366F #6FDA36

tetradic

#366FDA #DA36C1 #DAA136 #36DA4F

square

#366FDA #DA36C1 #DAA136 #36DA4F

split-complementary

#366FDA #DA4F36 #C1DA36

monochromatic

#173B7E #2153B2 #366FDA #6A94E4 #9DB9ED

Accessibility & contrast

On white

4.73

#366FDA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#366FDA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FDA

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FDA	#FFFFFF	#000000	##FFFFFF
##366FDA	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#307BDE

Deuteranopia (green-blind)

#006CD8

Tritanopia (blue-blind)

#00899A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #366fda;
/* rgb */ color: rgb(54, 111, 218);
/* oklch */ color: oklch(56.2% 0.175 261.6);

Tailwind

colors: {
  custom: {
    50: '#8397e6',
    500: '#366fda',
    950: '#000000',
  },
}

SCSS

$custom: #366fda;
$custom-light: #8397e6;
$custom-dark: #000000;

JSON

{
  "hex": "#366fda",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 218
  },
  "hsl": {
    "h": 219.146,
    "s": 68.908,
    "l": 53.333
  },
  "oklch": {
    "l": 0.56245,
    "c": 0.17493,
    "h": 261.6
  },
  "luminance": 0.17215
}

Semantic roles & 50–950 ramp

primary

#366FDA

secondary

#D9C193

accent

#AF3CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #366FDA

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

Preview Lab → · Contrast checker → · Palette generator →