I'm looking for a color matching website, where you enter a color value such as #ffffff and several appropriate color values appear.

.colorlovers.com/ I usually use this one, but it's in English, but I searched some more for you. I hope there's something you like.

/

A very professional color matching website, and related software downloads. If it is too complicated to enter here /online.html can be based on your selected color, giving 16 kinds of color scheme.

Entering a keyword, such as "house" will produce the relevant colors, which is more interesting. Whether it's appropriate or not is a matter of opinion, though.

/tools/colorscheme/index-en.html

/tools/colorscheme2/index-en.html

Two tools on the same site, the former generates a color scheme based on brightness and saturation. The latter has a color block reference that approximates the site's mockup interface.

/

Selecting a base color immediately gives you five color schemes, which is very responsive.

/color_scheme.html

Also provides color matching tools that can be adjusted for saturation and brightness. It's a bit slow to open the first time, but after that it's a snap.

/

Simple and practical

bos.com/

Although the interface is quite rough, it provides a lot of color schemes, and there is also an instant self-scheming function, which is not very pleasant every time you have to refresh the page.