#366FCF#366FCF

#366FCF is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.5% C 0.160 H 260.2°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#366FCF
RGB	rgb(54, 111, 207)
HSL	hsl(218, 61%, 51%)
HSV	hsv(218, 74%, 81%)
CMYK	cmyk(73.9%, 46.4%, 0%, 18.8%)
CIE-LAB	lab(47.82, 14.48, -55.07)
CIE-LCH	lch(47.82, 56.94, 284.73°)
OKLab	oklab(55.48% -0.0273 -0.1579)
OKLCH	oklch(55.48% 0.16 260.2)
XYZ	xyz(18.4642, 16.6561, 61.2612)
Luminance	0.1666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#366FCF #CF9636

analogous

#36BBCF #366FCF #4936CF

triadic

#366FCF #CF366F #6FCF36

tetradic

#366FCF #CF36BB #CF9636 #36CF49

square

#366FCF #CF36BB #CF9636 #36CF49

split-complementary

#366FCF #CF4936 #BBCF36

monochromatic

#1B3A70 #2754A1 #366FCF #6792DB #99B6E7

Accessibility & contrast

On white

4.85

#366FCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#366FCF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #366FCF

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##366FCF	#FFFFFF	#000000	##FFFFFF
##366FCF	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C79D3

Deuteranopia (green-blind)

#166BCD

Tritanopia (blue-blind)

#008695

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #366fcf;
/* rgb */ color: rgb(54, 111, 207);
/* oklch */ color: oklch(55.5% 0.160 260.2);

Tailwind

colors: {
  custom: {
    50: '#8197de',
    500: '#366fcf',
    950: '#000000',
  },
}

SCSS

$custom: #366fcf;
$custom-light: #8197de;
$custom-dark: #000000;

JSON

{
  "hex": "#366fcf",
  "rgb": {
    "r": 54,
    "g": 111,
    "b": 207
  },
  "hsl": {
    "h": 217.647,
    "s": 61.446,
    "l": 51.176
  },
  "oklch": {
    "l": 0.5548,
    "c": 0.1603,
    "h": 260.2
  },
  "luminance": 0.16658
}

Semantic roles & 50–950 ramp

primary

#366FCF

secondary

#D2B98F

accent

#A843E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #366FCF

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

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