In Android 10, Google allows you to adjust the accent colors to give the phone a touch. When combined with the new system-wide dark mode, you look at eight different color combinations. There are seven more than what we had in the previous version and seven extra ways to help your phone stand out.
This feature is very similar to Oxygen OS's accent colors. It allows you to adjust the secondary color (as default is blue) wherever it appears in Settings and Quick Settings. This differs from the dark state of the system that turns the primary color from white to black. Instead, this will change the color of active Quick Settings plates, switches and more.
: Turn on developer options
The first thing you need is to enable developer options. To do so, open Settings and select "About Phone." Find the "Build Number" (which is the last option) and tap it seven times fast until you are taken to a new page that prompts you for your lock screen password, gesture or PIN. After successfully entering the requested information, a roasted message is displayed indicating "you are now a developer" and you will be returned to the previous page.
Return to Settings and select "System". Select "Advanced" and a new option will appear above "System Update" called "Developer Options". Select this option.
With the developer options open, scroll to the bottom of page until you see a grouping titled "Theming." Select the first option, "Accent color," and a popup will appear with four options: "Default for device, Black, Green and Purple." These are the accent colors you can choose to switch to, with blue as standard.  Download new themes for your pixel on Android 10 ” width=”532″ height=”532″ style=”max-width:532px;height:auto;”/>