#366FB3#366FB3

#366FB3 is a mid, vivid cyan. Relative luminance 0.154; OKLCH L 53.7% C 0.123 H 254.4°. Best body text is #FFFFFF at 5.15:1 contrast (WCAG AA passes).

Color values

HEX	#366FB3
RGB	rgb(54, 111, 179)
HSL	hsl(213, 54%, 46%)
HSV	hsv(213, 70%, 70%)
CMYK	cmyk(69.8%, 38%, 0%, 29.8%)
CIE-LAB	lab(46.19, 4.18, -41.54)
CIE-LCH	lch(46.19, 41.75, 275.75°)
OKLab	oklab(53.68% -0.0331 -0.1182)
OKLCH	oklch(53.68% 0.123 254.4)
XYZ	xyz(15.3395, 15.4062, 44.8044)
Luminance	0.1541 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FB3 #B37A36

analogous

#36ADB3 #366FB3 #3B36B3

triadic

#366FB3 #B3366F #6FB336

tetradic

#366FB3 #B336AD #B37A36 #36B33B

square

#366FB3 #B336AD #B37A36 #36B33B

split-complementary

#366FB3 #B33B36 #ADB336

monochromatic

#1A3555 #285284 #366FB3 #598ECD #88AEDB

Accessibility & contrast

On white

5.15

#366FB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.08

#366FB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FB3

5.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FB3	#FFFFFF	#000000	##FFFFFF
##366FB3	1.00	5.15	4.08	5.15
#FFFFFF	5.15	1.00	21.00	1.00
#000000	4.08	21.00	1.00	21.00
##FFFFFF	5.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5074B6

Deuteranopia (green-blind)

#3E68B2

Tritanopia (blue-blind)

#007F88

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #366fb3;
/* rgb */ color: rgb(54, 111, 179);
/* oklch */ color: oklch(53.7% 0.123 254.4);

Tailwind

colors: {
  custom: {
    50: '#7c97ca',
    500: '#366fb3',
    950: '#000000',
  },
}

SCSS

$custom: #366fb3;
$custom-light: #7c97ca;
$custom-dark: #000000;

JSON

{
  "hex": "#366fb3",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 179
  },
  "hsl": {
    "h": 212.64,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.53681,
    "c": 0.12276,
    "h": 254.4
  },
  "luminance": 0.15408
}

Semantic roles & 50–950 ramp

primary

#366FB3

secondary

#C5A580

accent

#9A4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366FB3

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

Preview Lab → · Contrast checker → · Palette generator →