#366CBB#366CBB

#366CBB is a mid, vivid blue. Relative luminance 0.151; OKLCH L 53.5% C 0.137 H 258.0°. Best body text is #FFFFFF at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#366CBB
RGB	rgb(54, 108, 187)
HSL	hsl(216, 55%, 47%)
HSV	hsv(216, 71%, 73%)
CMYK	cmyk(71.1%, 42.2%, 0%, 26.7%)
CIE-LAB	lab(45.76, 8.99, -46.86)
CIE-LCH	lch(45.76, 47.71, 280.86°)
OKLab	oklab(53.5% -0.0284 -0.1339)
OKLCH	oklch(53.5% 0.137 258)
XYZ	xyz(15.8503, 15.0956, 49.0825)
Luminance	0.1510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366CBB #BB8536

analogous

#36AFBB #366CBB #4236BB

triadic

#366CBB #BB366C #6CBB36

tetradic

#366CBB #BB36AF #BB8536 #36BB42

square

#366CBB #BB36AF #BB8536 #36BB42

split-complementary

#366CBB #BB4236 #AFBB36

monochromatic

#1B355C #28518C #366CBB #5E8CD0 #8DAEDE

Accessibility & contrast

On white

5.22

#366CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#366CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366CBB

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366CBB	#FFFFFF	#000000	##FFFFFF
##366CBB	1.00	5.22	4.02	5.22
#FFFFFF	5.22	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4673BE

Deuteranopia (green-blind)

#3067B9

Tritanopia (blue-blind)

#007E8A

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #366cbb;
/* rgb */ color: rgb(54, 108, 187);
/* oklch */ color: oklch(53.5% 0.137 258.0);

Tailwind

colors: {
  custom: {
    50: '#7d95d0',
    500: '#366cbb',
    950: '#000000',
  },
}

SCSS

$custom: #366cbb;
$custom-light: #7d95d0;
$custom-dark: #000000;

JSON

{
  "hex": "#366cbb",
  "rgb": {
    "r": 54,
    "g": 108,
    "b": 187
  },
  "hsl": {
    "h": 215.639,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.53501,
    "c": 0.13683,
    "h": 258
  },
  "luminance": 0.15097
}

Semantic roles & 50–950 ramp

primary

#366CBB

secondary

#C9AD84

accent

#A249DF

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #366CBB

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

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