#366DD3#366DD3

#366DD3 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.3% C 0.168 H 261.4°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#366DD3
RGB	rgb(54, 109, 211)
HSL	hsl(219, 64%, 52%)
HSV	hsv(219, 74%, 83%)
CMYK	cmyk(74.4%, 48.3%, 0%, 17.3%)
CIE-LAB	lab(47.52, 17.22, -57.83)
CIE-LCH	lch(47.52, 60.34, 286.58°)
OKLab	oklab(55.33% -0.0251 -0.1661)
OKLCH	oklch(55.33% 0.168 261.4)
XYZ	xyz(18.7436, 16.4226, 63.7974)
Luminance	0.1643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366DD3 #D39C36

analogous

#36BCD3 #366DD3 #4E36D3

triadic

#366DD3 #D3366D #6DD336

tetradic

#366DD3 #D336BC #D39C36 #36D34E

square

#366DD3 #D336BC #D39C36 #36D34E

split-complementary

#366DD3 #D34E36 #BCD336

monochromatic

#1A3A75 #2552A7 #366DD3 #6891DE #9AB6E9

Accessibility & contrast

On white

4.90

#366DD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#366DD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366DD3

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366DD3	#FFFFFF	#000000	##FFFFFF
##366DD3	1.00	4.90	4.28	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3378D7

Deuteranopia (green-blind)

#006AD1

Tritanopia (blue-blind)

#008596

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #366dd3;
/* rgb */ color: rgb(54, 109, 211);
/* oklch */ color: oklch(55.3% 0.168 261.4);

Tailwind

colors: {
  custom: {
    50: '#8296e1',
    500: '#366dd3',
    950: '#000000',
  },
}

SCSS

$custom: #366dd3;
$custom-light: #8296e1;
$custom-dark: #000000;

JSON

{
  "hex": "#366dd3",
  "rgb": {
    "r": 54,
    "g": 109,
    "b": 211
  },
  "hsl": {
    "h": 218.981,
    "s": 64.082,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55332,
    "c": 0.168,
    "h": 261.4
  },
  "luminance": 0.16425
}

Semantic roles & 50–950 ramp

primary

#366DD3

secondary

#D5BD90

accent

#AD41E7

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366DD3

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

Preview Lab → · Contrast checker → · Palette generator →