#366FD1#366FD1

#366FD1 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.6% C 0.163 H 260.5°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#366FD1
RGB	rgb(54, 111, 209)
HSL	hsl(218, 63%, 52%)
HSV	hsv(218, 74%, 82%)
CMYK	cmyk(74.2%, 46.9%, 0%, 18%)
CIE-LAB	lab(47.95, 15.22, -56.01)
CIE-LCH	lch(47.95, 58.04, 285.20°)
OKLab	oklab(55.62% -0.027 -0.1607)
OKLCH	oklch(55.62% 0.163 260.5)
XYZ	xyz(18.7102, 16.7545, 62.5571)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FD1 #D19836

analogous

#36BDD1 #366FD1 #4B36D1

triadic

#366FD1 #D1366F #6FD136

tetradic

#366FD1 #D136BD #D19836 #36D14B

square

#366FD1 #D136BD #D19836 #36D14B

split-complementary

#366FD1 #D14B36 #BDD136

monochromatic

#1A3B72 #2654A4 #366FD1 #6893DC #9AB6E8

Accessibility & contrast

On white

4.83

#366FD1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#366FD1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FD1

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FD1	#FFFFFF	#000000	##FFFFFF
##366FD1	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A79D5

Deuteranopia (green-blind)

#106BCF

Tritanopia (blue-blind)

#008696

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #366fd1;
/* rgb */ color: rgb(54, 111, 209);
/* oklch */ color: oklch(55.6% 0.163 260.5);

Tailwind

colors: {
  custom: {
    50: '#8197e0',
    500: '#366fd1',
    950: '#000000',
  },
}

SCSS

$custom: #366fd1;
$custom-light: #8197e0;
$custom-dark: #000000;

JSON

{
  "hex": "#366fd1",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 209
  },
  "hsl": {
    "h": 217.935,
    "s": 62.753,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55617,
    "c": 0.16296,
    "h": 260.5
  },
  "luminance": 0.16757
}

Semantic roles & 50–950 ramp

primary

#366FD1

secondary

#D3BA8F

accent

#AA42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366FD1

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

Preview Lab → · Contrast checker → · Palette generator →