The Binder textcolor is updated depending on the Binder Background color set in File > Options > Appearance > Binder > Colors > Binder background. When you set a dark background, the Binder text will be white, when you set it to a light color, the Binder text will be black.
If you mean the Title bar of the window, this is a Windows setting: Start / Settings / Personalization / Colors / Accent color. Also tick the checkbox at the bottom of that screen: Show accent color on the following surfaces: Title bars and Windows borders.
If by Title bar you mean the Menu bar or the Title bar of the Editor or the title bar of various panes, these follow the color named Window in the palette file:
Window(0,0,128) //Blue: Window background, Toolbars, Menubar, Pane headers bar, Footer bars, Unselected tab, Keyboard shortcut BG, Composition Mode BG (no image).
Some of these, for instance the Menubar background color can also be set in the qss stylesheet.
If your Morrowind-style Scrivener theme is ready, you can share it on the Windows Themes post.