#366BB8#366BB8

#366BB8 is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.1% C 0.134 H 257.9°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#366BB8
RGB	rgb(54, 107, 184)
HSL	hsl(216, 55%, 47%)
HSV	hsv(216, 71%, 72%)
CMYK	cmyk(70.7%, 41.8%, 0%, 27.8%)
CIE-LAB	lab(45.30, 8.51, -45.86)
CIE-LCH	lch(45.30, 46.64, 280.52°)
OKLab	oklab(53.09% -0.028 -0.1309)
OKLCH	oklch(53.09% 0.134 257.9)
XYZ	xyz(15.4276, 14.7587, 47.3738)
Luminance	0.1476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366BB8 #B88336

analogous

#36ACB8 #366BB8 #4236B8

triadic

#366BB8 #B8366B #6BB836

tetradic

#366BB8 #B836AC #B88336 #36B842

square

#366BB8 #B836AC #B88336 #36B842

split-complementary

#366BB8 #B84236 #ACB836

monochromatic

#1A3459 #284F89 #366BB8 #5C8BCF #8BADDD

Accessibility & contrast

On white

5.31

#366BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#366BB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366BB8

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366BB8	#FFFFFF	#000000	##FFFFFF
##366BB8	1.00	5.31	3.95	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4772BB

Deuteranopia (green-blind)

#3166B6

Tritanopia (blue-blind)

#007D88

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #366bb8;
/* rgb */ color: rgb(54, 107, 184);
/* oklch */ color: oklch(53.1% 0.134 257.9);

Tailwind

colors: {
  custom: {
    50: '#7d94ce',
    500: '#366bb8',
    950: '#000000',
  },
}

SCSS

$custom: #366bb8;
$custom-light: #7d94ce;
$custom-dark: #000000;

JSON

{
  "hex": "#366bb8",
  "rgb": {
    "r": 54,
    "g": 107,
    "b": 184
  },
  "hsl": {
    "h": 215.538,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.53086,
    "c": 0.13391,
    "h": 257.9
  },
  "luminance": 0.1476
}

Semantic roles & 50–950 ramp

primary

#366BB8

secondary

#C7AB82

accent

#A24ADE

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #366BB8

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

Preview Lab → · Contrast checker → · Palette generator →