#366CBC#366CBC

#366CBC is a mid, vivid blue. Relative luminance 0.151; OKLCH L 53.6% C 0.138 H 258.2°. Best body text is #FFFFFF at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#366CBC
RGB	rgb(54, 108, 188)
HSL	hsl(216, 55%, 47%)
HSV	hsv(216, 71%, 74%)
CMYK	cmyk(71.3%, 42.6%, 0%, 26.3%)
CIE-LAB	lab(45.82, 9.35, -47.35)
CIE-LCH	lch(45.82, 48.26, 281.18°)
OKLab	oklab(53.57% -0.0281 -0.1353)
OKLCH	oklch(53.57% 0.138 258.2)
XYZ	xyz(15.9577, 15.1385, 49.6482)
Luminance	0.1514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CBC #BC8636

analogous

#36AFBC #366CBC #4336BC

triadic

#366CBC #BC366C #6CBC36

tetradic

#366CBC #BC36AF #BC8636 #36BC43

square

#366CBC #BC36AF #BC8636 #36BC43

split-complementary

#366CBC #BC4336 #AFBC36

monochromatic

#1B355D #28518C #366CBC #5E8CD1 #8EAEDF

Accessibility & contrast

On white

5.21

#366CBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.03

#366CBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CBC

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CBC	#FFFFFF	#000000	##FFFFFF
##366CBC	1.00	5.21	4.03	5.21
#FFFFFF	5.21	1.00	21.00	1.00
#000000	4.03	21.00	1.00	21.00
##FFFFFF	5.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4673BF

Deuteranopia (green-blind)

#2F67BA

Tritanopia (blue-blind)

#007F8B

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #366cbc;
/* rgb */ color: rgb(54, 108, 188);
/* oklch */ color: oklch(53.6% 0.138 258.2);

Tailwind

colors: {
  custom: {
    50: '#7d95d1',
    500: '#366cbc',
    950: '#000000',
  },
}

SCSS

$custom: #366cbc;
$custom-light: #7d95d1;
$custom-dark: #000000;

JSON

{
  "hex": "#366cbc",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 188
  },
  "hsl": {
    "h": 215.821,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53565,
    "c": 0.13819,
    "h": 258.2
  },
  "luminance": 0.1514
}

Semantic roles & 50–950 ramp

primary

#366CBC

secondary

#C9AE85

accent

#A249DF

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #366CBC

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

Preview Lab → · Contrast checker → · Palette generator →