#366FCC#366FCC

#366FCC is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.3% C 0.156 H 259.7°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#366FCC
RGB	rgb(54, 111, 204)
HSL	hsl(217, 60%, 51%)
HSV	hsv(217, 74%, 80%)
CMYK	cmyk(73.5%, 45.6%, 0%, 20%)
CIE-LAB	lab(47.64, 13.37, -53.65)
CIE-LCH	lch(47.64, 55.29, 283.99°)
OKLab	oklab(55.28% -0.0278 -0.1538)
OKLCH	oklch(55.28% 0.156 259.7)
XYZ	xyz(18.1009, 16.5108, 59.3480)
Luminance	0.1651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FCC #CC9336

analogous

#36BACC #366FCC #4836CC

triadic

#366FCC #CC366F #6FCC36

tetradic

#366FCC #CC36BA #CC9336 #36CC48

square

#366FCC #CC36BA #CC9336 #36CC48

split-complementary

#366FCC #CC4836 #BACC36

monochromatic

#1B3A6C #28549D #366FCC #6792D8 #98B5E5

Accessibility & contrast

On white

4.88

#366FCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#366FCC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FCC

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FCC	#FFFFFF	#000000	##FFFFFF
##366FCC	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F78D0

Deuteranopia (green-blind)

#1E6BCA

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #366fcc;
/* rgb */ color: rgb(54, 111, 204);
/* oklch */ color: oklch(55.3% 0.156 259.7);

Tailwind

colors: {
  custom: {
    50: '#8097dc',
    500: '#366fcc',
    950: '#000000',
  },
}

SCSS

$custom: #366fcc;
$custom-light: #8097dc;
$custom-dark: #000000;

JSON

{
  "hex": "#366fcc",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 204
  },
  "hsl": {
    "h": 217.2,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.55277,
    "c": 0.15628,
    "h": 259.7
  },
  "luminance": 0.16513
}

Semantic roles & 50–950 ramp

primary

#366FCC

secondary

#D0B78E

accent

#A745E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366FCC

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

Preview Lab → · Contrast checker → · Palette generator →