#366CB8#366CB8

#366CB8 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.3% C 0.133 H 257.4°. Best body text is #FFFFFF at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#366CB8
RGB	rgb(54, 108, 184)
HSL	hsl(215, 55%, 47%)
HSV	hsv(215, 71%, 72%)
CMYK	cmyk(70.7%, 41.3%, 0%, 27.8%)
CIE-LAB	lab(45.59, 7.88, -45.40)
CIE-LCH	lch(45.59, 46.08, 279.85°)
OKLab	oklab(53.31% -0.029 -0.1296)
OKLCH	oklch(53.31% 0.133 257.4)
XYZ	xyz(15.5325, 14.9684, 47.4087)
Luminance	0.1497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CB8 #B88236

analogous

#36ADB8 #366CB8 #4136B8

triadic

#366CB8 #B8366C #6CB836

tetradic

#366CB8 #B836AD #B88236 #36B841

square

#366CB8 #B836AD #B88236 #36B841

split-complementary

#366CB8 #B84136 #ADB836

monochromatic

#1A3459 #285089 #366CB8 #5C8CCF #8BADDD

Accessibility & contrast

On white

5.26

#366CB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.99

#366CB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CB8

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CB8	#FFFFFF	#000000	##FFFFFF
##366CB8	1.00	5.26	3.99	5.26
#FFFFFF	5.26	1.00	21.00	1.00
#000000	3.99	21.00	1.00	21.00
##FFFFFF	5.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4872BB

Deuteranopia (green-blind)

#3366B6

Tritanopia (blue-blind)

#007E89

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #366cb8;
/* rgb */ color: rgb(54, 108, 184);
/* oklch */ color: oklch(53.3% 0.133 257.4);

Tailwind

colors: {
  custom: {
    50: '#7c95ce',
    500: '#366cb8',
    950: '#000000',
  },
}

SCSS

$custom: #366cb8;
$custom-light: #7c95ce;
$custom-dark: #000000;

JSON

{
  "hex": "#366cb8",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 184
  },
  "hsl": {
    "h": 215.077,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.5331,
    "c": 0.13277,
    "h": 257.4
  },
  "luminance": 0.1497
}

Semantic roles & 50–950 ramp

primary

#366CB8

secondary

#C7AB82

accent

#A04ADE

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366CB8

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

Preview Lab → · Contrast checker → · Palette generator →