Hi @sanati.dines , in Views for charts you can choose different colors from the color scheme available in visual or code editor

using Visual editor: click on General settings at the top right -> under the Color Scheme for Layers click on the dropdown and choose the desired colours.

To add colours to Table component in views:

you first need to create a custom object in Knowledge Model by defining the display details you need.

Refer Display Rules content in help resource for complete understanding.

HTH

can't we customize color, which we want?

@uma.penme 

you can choose from one of the available color options in section Chart customisation option

https://docs.celonis.com/en/charts.html