#366DD1#366DD1

#366DD1 is a mid, vivid blue. Relative luminance 0.163; OKLCH L 55.2% C 0.165 H 261.2°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#366DD1
RGB	rgb(54, 109, 209)
HSL	hsl(219, 63%, 52%)
HSV	hsv(219, 74%, 82%)
CMYK	cmyk(74.2%, 47.8%, 0%, 18%)
CIE-LAB	lab(47.40, 16.48, -56.90)
CIE-LCH	lch(47.40, 59.24, 286.15°)
OKLab	oklab(55.19% -0.0253 -0.1634)
OKLCH	oklch(55.19% 0.165 261.2)
XYZ	xyz(18.4944, 16.3229, 62.4852)
Luminance	0.1633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366DD1 #D19A36

analogous

#36BAD1 #366DD1 #4D36D1

triadic

#366DD1 #D1366D #6DD136

tetradic

#366DD1 #D136BA #D19A36 #36D14D

square

#366DD1 #D136BA #D19A36 #36D14D

split-complementary

#366DD1 #D14D36 #BAD136

monochromatic

#1A3972 #2653A4 #366DD1 #6891DC #9AB5E8

Accessibility & contrast

On white

4.92

#366DD1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#366DD1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366DD1

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366DD1	#FFFFFF	#000000	##FFFFFF
##366DD1	1.00	4.92	4.26	4.92
#FFFFFF	4.92	1.00	21.00	1.00
#000000	4.26	21.00	1.00	21.00
##FFFFFF	4.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3578D5

Deuteranopia (green-blind)

#006ACF

Tritanopia (blue-blind)

#008595

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #366dd1;
/* rgb */ color: rgb(54, 109, 209);
/* oklch */ color: oklch(55.2% 0.165 261.2);

Tailwind

colors: {
  custom: {
    50: '#8196e0',
    500: '#366dd1',
    950: '#000000',
  },
}

SCSS

$custom: #366dd1;
$custom-light: #8196e0;
$custom-dark: #000000;

JSON

{
  "hex": "#366dd1",
  "rgb": {
    "r": 54,
    "g": 109,
    "b": 209
  },
  "hsl": {
    "h": 218.71,
    "s": 62.753,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55192,
    "c": 0.16533,
    "h": 261.2
  },
  "luminance": 0.16325
}

Semantic roles & 50–950 ramp

primary

#366DD1

secondary

#D3BB8F

accent

#AC42E6

background

#F8F9FD

surface

#F0F1FB

border

#CBCBD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366DD1

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

Preview Lab → · Contrast checker → · Palette generator →