Key changes to theme plugin keys

Main changes overview

This chapter highlights the new keys introduced, deprecated keys, and updates to the listItem .* group in JetBrains Fleet 1.44.

• New keys:

  • island.background: controls the background of the editor and tool panels.

  • background.primary: controls the window color underneath panels, including the header.

• Deprecated keys:

  • editor.background and tool.background: use island .background instead.

  • tabPanel.background: this key is deprecated as tabs are now placed above the editor or tool panel area.

  • background.default: use background.primary for better consistency.

• Updates to listItem.*: the listItem.* keys now control the style of list items across all UI elements, including context menus and completion popups. The following keys are deprecated:

  • editor.interline.listItem.*

  • popup.listItem.*

  Use colors with alpha parameters (for example, "DarkTint_15": "#18191B26") to indicate selected, focused, or hovered list items consistently in various background contexts.

Examples

island.background

The island.background key controls the background of the editor and tool panels.

background.primary

The background.primary key defines the window color around tool panels and the header.

listItem.*

The listItem.* keys provide consistent styling for focused, selected, or hovered list items across different components.