My client has given me one PowerPoint Presentation slid and he told me I have to use only those colours which are
available in that slide.
I have used tried to use Customer Color, but I was not getting the same colour which I need.
here is the process from where I the same colour.
below colours, I need to use 

 Below is the DASHBOARD

Now we can resolve this issue if we have HEX colour code.

Let's get the HEX colour code.
1)Open image in Paint.
Step 2 )Use Color picker and point on the colour which you need you will see in the foreground colour then click on edit color and you will see the RGB color for CODE. 
          

Copy RGB code and go to 
https://www.rgbtohex.net/


Once you will put the RGB code you will get your HEX Code. and then put this code in power bi Enjoy.

Regards

Varun Jain