By default, the Huawei smartphone uses a gray background color for the keyboard. You can change the design, which affects the background and keys of the keyboard layout. You'll have a choice of numerous colors and designs, such as color gradients.

Android 10 | EMUI 10.0
SwiftKey theme -  Open the  settings
SwiftKey theme -  Tap on  System & updates
SwiftKey theme -  Tap on  Language & input
SwiftKey theme -  Tap on  SwiftKey Keyboard
SwiftKey theme -  Tap on  Themes
SwiftKey theme -  Choose a  Theme
SwiftKey theme -  Tap on  Download
SwiftKey theme -  Follow the  instructions  on the display
  1. Open the settings
  2. Tap on System & updates
  3. Tap on Language & input
  4. Tap on SwiftKey Keyboard
  5. Tap on Themes
  6. Choose a Theme
  7. Tap on Download
  8. Follow the instructions on the display

Huawei Instructions