Theme: update blender light theme preferences

Copy from properties space.

release/scripts/presets/interface_theme/blender_light.xml

@@ -1059,29 +1059,29 @@
       <ThemePreferences>
         <space>
           <ThemeSpaceGeneric
-            back="#424242"
-            title="#eeeeee"
-            text="#e6e6e6"
+            back="#999999"
+            title="#181818"
+            text="#000000"
             text_hi="#ffffff"
-            header="#424242ff"
-            header_text="#eeeeee"
+            header="#b3b3b3ff"
+            header_text="#000000"
             header_text_hi="#ffffff"
-            button="#424242ff"
-            button_title="#ffffff"
-            button_text="#e5e5e5"
+            button="#7272727f"
+            button_title="#000000"
+            button_text="#000000"
             button_text_hi="#ffffff"
-            navigation_bar="#373737ff"
-            execution_buts="#373737ff"
-            tab_active="#4b4b4b"
-            tab_inactive="#2b2b2b"
-            tab_back="#232323ff"
-            tab_outline="#232323"
+            navigation_bar="#808080ff"
+            execution_buts="#808080ff"
+            tab_active="#6697e6"
+            tab_inactive="#535353"
+            tab_back="#404040ff"
+            tab_outline="#3c3c3c"
             >
             <panelcolors>
               <ThemePanelColors
-                header="#42424200"
-                back="#333333b3"
-                sub_back="#0000003e"
+                header="#c2c2c2ea"
+                back="#99999980"
+                sub_back="#00000024"
                 >
               </ThemePanelColors>
             </panelcolors>