How to draw transition colors on hand-painted walls?

Indoor wall painting can't use ordinary watercolor.

This wall will absorb water.

It will fade in a few days.

There will be cracks.

Splashing water will also make you dizzy.

The landlord can use textile pigments, which are relatively stable.

When drawing a wall, there are two ways to compose a gradient with a pencil first.

One is: dilute with water.

In this way, the painted color is lighter.

The second is: adding white.

This effect is stronger.

But the brushwork of the landlord is better.

Then use this.

The effect of this wall will be more existential!

Hope to help the landlord!