#366FC8#366FC8

#366FC8 is a mid, vivid blue. Relative luminance 0.163; OKLCH L 55.0% C 0.151 H 259.1°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#366FC8
RGB	rgb(54, 111, 200)
HSL	hsl(217, 57%, 50%)
HSV	hsv(217, 73%, 78%)
CMYK	cmyk(73%, 44.5%, 0%, 21.6%)
CIE-LAB	lab(47.39, 11.89, -51.75)
CIE-LCH	lch(47.39, 53.10, 282.94°)
OKLab	oklab(55.01% -0.0285 -0.1482)
OKLCH	oklch(55.01% 0.151 259.1)
XYZ	xyz(17.6273, 16.3213, 56.8537)
Luminance	0.1632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FC8 #C88F36

analogous

#36B8C8 #366FC8 #4636C8

triadic

#366FC8 #C8366F #6FC836

tetradic

#366FC8 #C836B8 #C88F36 #36C846

square

#366FC8 #C836B8 #C88F36 #36C846

split-complementary

#366FC8 #C84636 #B8C836

monochromatic

#1C3A68 #295498 #366FC8 #6691D6 #96B4E3

Accessibility & contrast

On white

4.92

#366FC8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#366FC8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FC8

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FC8	#FFFFFF	#000000	##FFFFFF
##366FC8	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)

#4278CB

Deuteranopia (green-blind)

#256AC6

Tritanopia (blue-blind)

#008492

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #366fc8;
/* rgb */ color: rgb(54, 111, 200);
/* oklch */ color: oklch(55.0% 0.151 259.1);

Tailwind

colors: {
  custom: {
    50: '#8097d9',
    500: '#366fc8',
    950: '#000000',
  },
}

SCSS

$custom: #366fc8;
$custom-light: #8097d9;
$custom-dark: #000000;

JSON

{
  "hex": "#366fc8",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 200
  },
  "hsl": {
    "h": 216.575,
    "s": 57.48,
    "l": 49.804
  },
  "oklch": {
    "l": 0.5501,
    "c": 0.15091,
    "h": 259.1
  },
  "luminance": 0.16323
}

Semantic roles & 50–950 ramp

primary

#366FC8

secondary

#CEB48C

accent

#A547E1

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D15

muted

#7C7E83

Preview Lab

Preview with #366FC8

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

Preview Lab → · Contrast checker → · Palette generator →