To darken or make "shades" of your watercolors simply add a small amount of black watercolor to it. You can also darken a hue by adding a darker "staining" hue of the same family to it. For example, add a dark red (i.e. alizarin crimson or thalo red) to a lighter red (i.e. cadmium scarlet or cadmium red). Because alizarin crimson (or thalo red) is a staining hue, only add a tiny amount of it to your light red hue.
============================================================================
The best way is to add black to it, but any colour darker than the colour you already have will make a difference.
What it can do is to make watercolor.(sometimes,it makes waterproof)
Watercolor.
Acrylic is not water soluble once dry. Watercolor can be reactivated with water.Dilute a small amount of paint in the normal manner for painting and make a brush stroke on a piece of scrap paper. Wash out your brush. Let the paint stroke dry for 20 minutes and then try to re-wet it with a brush full of water. If it re-wets and smears, it's watercolor. If it remains untouched, it's acrylic.
If your cat eats watercolor paint that is non-toxic, they should be fine. They may become ill if they eat a watercolor paint that is made toxic ingredients like cobalt or cadmium and you should contact your vet.
wow
yes
Any color can be made darker by adding black.
"GOUACHE", paints, (pronounced 'g-wash') are water soluble paints in the watercolor family. Unlike traditional watercolor paint, which is translucent, gouache is an opaque medium, with a matte finish as opposed to a lustre. It can be mixed with traditional watercolor, and painted OVER watercolor, for interesting effect.
Reconstituting dried out watercolor paints is often somewhat difficult. Most artists recommend trying to add a small amount of water to the paint to reconstitute.
Darker tints will make a room smaller.
A darker navy blue
Oil paint, watercolor, pastels.