#366EB3#366EB3

#366EB3 is a mid, vivid cyan. Relative luminance 0.152; OKLCH L 53.5% C 0.124 H 255.0°. Best body text is #FFFFFF at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#366EB3
RGB	rgb(54, 110, 179)
HSL	hsl(213, 54%, 46%)
HSV	hsv(213, 70%, 70%)
CMYK	cmyk(69.8%, 38.5%, 0%, 29.8%)
CIE-LAB	lab(45.89, 4.80, -42.01)
CIE-LCH	lch(45.89, 42.28, 276.52°)
OKLab	oklab(53.45% -0.0321 -0.1196)
OKLCH	oklch(53.45% 0.124 255)
XYZ	xyz(15.2310, 15.1892, 44.7682)
Luminance	0.1519 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366EB3 #B37B36

analogous

#36ACB3 #366EB3 #3C36B3

triadic

#366EB3 #B3366E #6EB336

tetradic

#366EB3 #B336AC #B37B36 #36B33C

square

#366EB3 #B336AC #B37B36 #36B33C

split-complementary

#366EB3 #B33C36 #ACB336

monochromatic

#1A3455 #285184 #366EB3 #598DCD #88ADDB

Accessibility & contrast

On white

5.20

#366EB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.04

#366EB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366EB3

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366EB3	#FFFFFF	#000000	##FFFFFF
##366EB3	1.00	5.20	4.04	5.20
#FFFFFF	5.20	1.00	21.00	1.00
#000000	4.04	21.00	1.00	21.00
##FFFFFF	5.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F73B6

Deuteranopia (green-blind)

#3C67B2

Tritanopia (blue-blind)

#007E88

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #366eb3;
/* rgb */ color: rgb(54, 110, 179);
/* oklch */ color: oklch(53.5% 0.124 255.0);

Tailwind

colors: {
  custom: {
    50: '#7c97ca',
    500: '#366eb3',
    950: '#000000',
  },
}

SCSS

$custom: #366eb3;
$custom-light: #7c97ca;
$custom-dark: #000000;

JSON

{
  "hex": "#366eb3",
  "rgb": {
    "r": 54,
    "g": 110,
    "b": 179
  },
  "hsl": {
    "h": 213.12,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.53453,
    "c": 0.12383,
    "h": 255
  },
  "luminance": 0.15191
}

Semantic roles & 50–950 ramp

primary

#366EB3

secondary

#C5A680

accent

#9C4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366EB3

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

Preview Lab → · Contrast checker → · Palette generator →