Go to Settings → Branding.
1.Upload your logo. It appears on invoices, estimates and contracts.
2.The colour is read from the logo automatically and used on the rule at the top of the document, the figures, and the block behind the amount due.
If your logo was uploaded before this existed
Press Read from logo. It reads the one already on file without you re-uploading it.
If the colour is wrong
Pick one by hand with the colour selector. Extraction is a guess — it is a good guess on a logo with one strong colour and a poor one on a photograph.