Is color scheme file cached?

Question

I'm using IDLE color scheme for Sublime 3, but it did not have diff syntax highglight. SO I found one that I could use it. I added it using PackageResourceViewer. After adding additional content into scheme, I noticed diff syntax working. But I did not like that insertion was colored blue and diff header was green.

So I swapped colors between diff header and insertion. But it had no effect. Header was still green and insertion was still blue. It looks like file is cached somewhere, because I could even delete diff highlight declaration and it would still show me highlights.

My current scheme (with swapped colors) is this:

   <dict>
        <key>name</key>
        <string>diff.header</string>
        <key>scope</key>
        <string>meta.diff, meta.diff.header</string>
        <key>settings</key>
        <dict>
            <key>foreground</key>
            <string>#3333FF</string>
        </dict>
    </dict>
    <dict>
        <key>name</key>
        <string>diff.deleted</string>
        <key>scope</key>
        <string>markup.deleted</string>
        <key>settings</key>
        <dict>
            <key>foreground</key>
            <string>#DD5555</string>
        </dict>
    </dict>
    <dict>
        <key>name</key>
        <string>diff.inserted</string>
        <key>scope</key>
        <string>markup.inserted</string>
        <key>settings</key>
        <dict>
            <key>foreground</key>
            <string>#009933</string>
        </dict>
    </dict>
    <dict>
        <key>name</key>
        <string>diff.changed</string>
        <key>scope</key>
        <string>markup.changed</string>
        <key>settings</key>
        <dict>
            <key>foreground</key>
            <string>#E6DB74</string>
        </dict>
    </dict>

Note. Even if I close sublime, open with PRV, I can see that in file my changes persist, but actual syntax is still showed from initial copy/paste.

Answer 1

Some packages quite often decide to make tweaks to the color scheme, and thus create a new color scheme so as to not mess with the original - then they set your active color scheme to their tweaked copy. Therefore, although ST doesn't cache the color scheme - it will look as though it does.

To check, you can see the output from view.settings().get('color_scheme') Enter in the ST console (View menu -> Show Console) - most often the packages that do this name their copy of the color scheme as the original with (package name) appended to the end.

Or check the main User preferences file. Just set it back to your color scheme, and the package will probably do the same thing again but at least it should include your changes this time.