Go to View -> Command Palette or press Ctrl+Shift+P
Then type Install Extension and click Enter on Extensions : Install Extension .
Search the theme name DeepSea Theme or DeepSea
Select the DeepSea Theme or press Enter to install
As a developer, Deepsea knows the importance of a theme that is functional and easy on the eyes during those marathon coding sessions. Deepsea's theme is designed specifically with late night coding in mind, catering to the needs of developers like themselves. Deepsea let you stay focused and productive, even during the late hours.