#366CB9#366CB9

#366CB9 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.4% C 0.134 H 257.6°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#366CB9
RGB	rgb(54, 108, 185)
HSL	hsl(215, 55%, 47%)
HSV	hsv(215, 71%, 73%)
CMYK	cmyk(70.8%, 41.6%, 0%, 27.5%)
CIE-LAB	lab(45.65, 8.25, -45.88)
CIE-LCH	lch(45.65, 46.62, 280.19°)
OKLab	oklab(53.37% -0.0288 -0.131)
OKLCH	oklch(53.37% 0.134 257.6)
XYZ	xyz(15.6377, 15.0105, 47.9627)
Luminance	0.1501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CB9 #B98336

analogous

#36AEB9 #366CB9 #4136B9

triadic

#366CB9 #B9366C #6CB936

tetradic

#366CB9 #B936AE #B98336 #36B941

square

#366CB9 #B936AE #B98336 #36B941

split-complementary

#366CB9 #B94136 #AEB936

monochromatic

#1A355A #28508A #366CB9 #5D8CD0 #8CAEDD

Accessibility & contrast

On white

5.25

#366CB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#366CB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CB9

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CB9	#FFFFFF	#000000	##FFFFFF
##366CB9	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4873BC

Deuteranopia (green-blind)

#3266B7

Tritanopia (blue-blind)

#007E89

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #366cb9;
/* rgb */ color: rgb(54, 108, 185);
/* oklch */ color: oklch(53.4% 0.134 257.6);

Tailwind

colors: {
  custom: {
    50: '#7d95ce',
    500: '#366cb9',
    950: '#000000',
  },
}

SCSS

$custom: #366cb9;
$custom-light: #7d95ce;
$custom-dark: #000000;

JSON

{
  "hex": "#366cb9",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 185
  },
  "hsl": {
    "h": 215.267,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.53373,
    "c": 0.13412,
    "h": 257.6
  },
  "luminance": 0.15012
}

Semantic roles & 50–950 ramp

primary

#366CB9

secondary

#C8AB83

accent

#A14ADE

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #366CB9

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

Preview Lab → · Contrast checker → · Palette generator →