#366BB3#366BB3

#366BB3 is a mid, vivid cyan. Relative luminance 0.146; OKLCH L 52.8% C 0.127 H 256.7°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#366BB3
RGB	rgb(54, 107, 179)
HSL	hsl(215, 54%, 46%)
HSV	hsv(215, 70%, 70%)
CMYK	cmyk(69.8%, 40.2%, 0%, 29.8%)
CIE-LAB	lab(45.02, 6.68, -43.40)
CIE-LCH	lch(45.02, 43.91, 278.75°)
OKLab	oklab(52.77% -0.0291 -0.1237)
OKLCH	oklch(52.77% 0.127 256.7)
XYZ	xyz(14.9127, 14.5528, 44.6621)
Luminance	0.1455 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366BB3 #B37E36

analogous

#36A9B3 #366BB3 #3F36B3

triadic

#366BB3 #B3366B #6BB336

tetradic

#366BB3 #B336A9 #B37E36 #36B33F

square

#366BB3 #B336A9 #B37E36 #36B33F

split-complementary

#366BB3 #B33F36 #A9B336

monochromatic

#1A3355 #284F84 #366BB3 #598ACD #88ABDB

Accessibility & contrast

On white

5.37

#366BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#366BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366BB3

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366BB3	#FFFFFF	#000000	##FFFFFF
##366BB3	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A71B6

Deuteranopia (green-blind)

#3665B2

Tritanopia (blue-blind)

#007C86

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #366bb3;
/* rgb */ color: rgb(54, 107, 179);
/* oklch */ color: oklch(52.8% 0.127 256.7);

Tailwind

colors: {
  custom: {
    50: '#7c94ca',
    500: '#366bb3',
    950: '#000000',
  },
}

SCSS

$custom: #366bb3;
$custom-light: #7c94ca;
$custom-dark: #000000;

JSON

{
  "hex": "#366bb3",
  "rgb": {
    "r": 54,
    "g": 107,
    "b": 179
  },
  "hsl": {
    "h": 214.56,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.5277,
    "c": 0.12712,
    "h": 256.7
  },
  "luminance": 0.14554
}

Semantic roles & 50–950 ramp

primary

#366BB3

secondary

#C5A880

accent

#9F4BDD

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366BB3

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

Preview Lab → · Contrast checker → · Palette generator →