Pull git indicator colors out of theme

Co-Authored-By: Kay Simmons <kay@zed.dev>
Co-Authored-By: Mikayla Maki <mikayla@zed.dev>

styles/src/styleTree/editor.ts

@@ -7,6 +7,7 @@ import {
   player,
   popoverShadow,
   text,
+  textColor,
   TextColor,
 } from "./components";
 import hoverPopover from "./hoverPopover";
@@ -59,8 +60,9 @@ export default function editor(theme: Theme) {
       indicator: iconColor(theme, "secondary"),
       verticalScale: 0.618
     },
-    diffBackgroundDeleted: backgroundColor(theme, "error"),
-    diffBackgroundInserted: backgroundColor(theme, "ok"),
+    diffBackgroundDeleted: theme.ramps.red(0.3).hex(),
+    diffBackgroundInserted: theme.ramps.green(0.3).hex(),
+    diffBackgroundModified: theme.ramps.blue(0.3).hex(),
     documentHighlightReadBackground: theme.editor.highlight.occurrence,
     documentHighlightWriteBackground: theme.editor.highlight.activeOccurrence,
     errorColor: theme.textColor.error,