#366AB3#366AB3

#366AB3 is a mid, vivid blue. Relative luminance 0.143; OKLCH L 52.5% C 0.128 H 257.3°. Best body text is #FFFFFF at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#366AB3
RGB	rgb(54, 106, 179)
HSL	hsl(215, 54%, 46%)
HSV	hsv(215, 70%, 70%)
CMYK	cmyk(69.8%, 40.8%, 0%, 29.8%)
CIE-LAB	lab(44.72, 7.31, -43.87)
CIE-LCH	lch(44.72, 44.47, 279.46°)
OKLab	oklab(52.54% -0.0282 -0.1251)
OKLCH	oklch(52.54% 0.128 257.3)
XYZ	xyz(14.8091, 14.3455, 44.6276)
Luminance	0.1435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366AB3 #B37F36

analogous

#36A8B3 #366AB3 #4036B3

triadic

#366AB3 #B3366A #6AB336

tetradic

#366AB3 #B336A8 #B37F36 #36B340

square

#366AB3 #B336A8 #B37F36 #36B340

split-complementary

#366AB3 #B34036 #A8B336

monochromatic

#1A3255 #284E84 #366AB3 #5989CD #88ABDB

Accessibility & contrast

On white

5.43

#366AB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#366AB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366AB3

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366AB3	#FFFFFF	#000000	##FFFFFF
##366AB3	1.00	5.43	3.87	5.43
#FFFFFF	5.43	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4870B6

Deuteranopia (green-blind)

#3464B2

Tritanopia (blue-blind)

#007B86

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #366ab3;
/* rgb */ color: rgb(54, 106, 179);
/* oklch */ color: oklch(52.5% 0.128 257.3);

Tailwind

colors: {
  custom: {
    50: '#7c94ca',
    500: '#366ab3',
    950: '#000000',
  },
}

SCSS

$custom: #366ab3;
$custom-light: #7c94ca;
$custom-dark: #000000;

JSON

{
  "hex": "#366ab3",
  "rgb": {
    "r": 54,
    "g": 106,
    "b": 179
  },
  "hsl": {
    "h": 215.04,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.52544,
    "c": 0.12824,
    "h": 257.3
  },
  "luminance": 0.14347
}

Semantic roles & 50–950 ramp

primary

#366AB3

secondary

#C5A880

accent

#A04BDD

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366AB3

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

Preview Lab → · Contrast checker → · Palette generator →