#366DBB#366DBB

#366DBB is a mid, vivid blue. Relative luminance 0.153; OKLCH L 53.7% C 0.136 H 257.5°. Best body text is #FFFFFF at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#366DBB
RGB	rgb(54, 109, 187)
HSL	hsl(215, 55%, 47%)
HSV	hsv(215, 71%, 73%)
CMYK	cmyk(71.1%, 41.7%, 0%, 26.7%)
CIE-LAB	lab(46.05, 8.36, -46.40)
CIE-LCH	lch(46.05, 47.15, 280.21°)
OKLab	oklab(53.72% -0.0293 -0.1325)
OKLCH	oklch(53.72% 0.136 257.5)
XYZ	xyz(15.9563, 15.3077, 49.1178)
Luminance	0.1531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366DBB #BB8436

analogous

#36B0BB #366DBB #4136BB

triadic

#366DBB #BB366D #6DBB36

tetradic

#366DBB #BB36B0 #BB8436 #36BB41

square

#366DBB #BB36B0 #BB8436 #36BB41

split-complementary

#366DBB #BB4136 #B0BB36

monochromatic

#1B365C #28518C #366DBB #5E8DD0 #8DAFDE

Accessibility & contrast

On white

5.17

#366DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#366DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366DBB

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366DBB	#FFFFFF	#000000	##FFFFFF
##366DBB	1.00	5.17	4.06	5.17
#FFFFFF	5.17	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4874BE

Deuteranopia (green-blind)

#3267B9

Tritanopia (blue-blind)

#007F8B

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #366dbb;
/* rgb */ color: rgb(54, 109, 187);
/* oklch */ color: oklch(53.7% 0.136 257.5);

Tailwind

colors: {
  custom: {
    50: '#7d96d0',
    500: '#366dbb',
    950: '#000000',
  },
}

SCSS

$custom: #366dbb;
$custom-light: #7d96d0;
$custom-dark: #000000;

JSON

{
  "hex": "#366dbb",
  "rgb": {
    "r": 54,
    "g": 109,
    "b": 187
  },
  "hsl": {
    "h": 215.188,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.53724,
    "c": 0.1357,
    "h": 257.5
  },
  "luminance": 0.15309
}

Semantic roles & 50–950 ramp

primary

#366DBB

secondary

#C9AC84

accent

#A149DF

background

#F8F9FC

surface

#EFF1F9

border

#CACBD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #366DBB

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

Preview Lab → · Contrast checker → · Palette generator →