#366EA4#366EA4

#366EA4 is a mid, moderate cyan. Relative luminance 0.146; OKLCH L 52.6% C 0.104 H 249.7°. Best body text is #FFFFFF at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#366EA4
RGB	rgb(54, 110, 164)
HSL	hsl(209, 50%, 43%)
HSV	hsv(209, 67%, 64%)
CMYK	cmyk(67.1%, 32.9%, 0%, 35.7%)
CIE-LAB	lab(45.10, -0.61, -34.48)
CIE-LCH	lch(45.10, 34.48, 268.99°)
OKLab	oklab(52.58% -0.0361 -0.0976)
OKLCH	oklch(52.58% 0.104 249.7)
XYZ	xyz(13.7956, 14.6151, 37.2087)
Luminance	0.1462 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366EA4 #A46C36

analogous

#36A4A3 #366EA4 #3637A4

triadic

#366EA4 #A4366E #6EA436

tetradic

#366EA4 #A336A4 #A46C36 #37A436

square

#366EA4 #A336A4 #A46C36 #37A436

split-complementary

#366EA4 #A43637 #A4A336

monochromatic

#183048 #274F76 #366EA4 #518DC6 #7FABD5

Accessibility & contrast

On white

5.35

#366EA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#366EA4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366EA4

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366EA4	#FFFFFF	#000000	##FFFFFF
##366EA4	1.00	5.35	3.92	5.35
#FFFFFF	5.35	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5671A6

Deuteranopia (green-blind)

#4766A3

Tritanopia (blue-blind)

#007B81

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #366ea4;
/* rgb */ color: rgb(54, 110, 164);
/* oklch */ color: oklch(52.6% 0.104 249.7);

Tailwind

colors: {
  custom: {
    50: '#7997bf',
    500: '#366ea4',
    950: '#000000',
  },
}

SCSS

$custom: #366ea4;
$custom-light: #7997bf;
$custom-dark: #000000;

JSON

{
  "hex": "#366ea4",
  "rgb": {
    "r": 54,
    "g": 110,
    "b": 164
  },
  "hsl": {
    "h": 209.455,
    "s": 50.459,
    "l": 42.745
  },
  "oklch": {
    "l": 0.52577,
    "c": 0.10406,
    "h": 249.7
  },
  "luminance": 0.14616
}

Semantic roles & 50–950 ramp

primary

#366EA4

secondary

#BE9A78

accent

#934EDA

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#0A0D12

muted

#7C7E81

Preview Lab

Preview with #366EA4

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

Preview Lab → · Contrast checker → · Palette generator →