Color highlighting for diff in ST3

I frequently need to perform a diff on two of my open views in Sublime Text 3. I use the EasyDiff package for this purpose. This package works nicely and shows me the diff changes in a new ST3 tab. The only problem was that the changes showed up without color highlighting, even when I was using Diff syntax highlighting.

I was using iPlastic color theme that comes with ST3 by default. After searching for “diff color highlighting”, I found a few links which claim to solve this issue. Somehow, these solutions did not work for me.

Then, I came across the following snippet of code in a color theme which did work:

<!-- Adding stuff for diff. This works in ST3 -->
        <dict>
            <key>name</key>
            <string>diff header from</string>
            <key>scope</key>
            <string>meta.diff.header.from-file</string>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#FFDDDD</string>
                <key>fontStyle</key>
                <string></string>
                <key>foreground</key>
                <string>#000000</string>
            </dict>
        </dict>
        <dict>
            <key>name</key>
            <string>diff header to</string>
            <key>scope</key>
            <string>meta.diff.header.to-file</string>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#DDFFDD</string>
                <key>fontStyle</key>
                <string></string>
                <key>foreground</key>
                <string>#000000</string>
            </dict>
        </dict>
        <dict>
            <key>name</key>
            <string>diff inserted</string>
            <key>scope</key>
            <string>markup.inserted.diff</string>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#DDFFDD</string>
                <key>fontStyle</key>
                <string></string>
            </dict>
        </dict>
        <dict>
            <key>name</key>
            <string>diff deleted</string>
            <key>scope</key>
            <string>markup.deleted.diff</string>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#FFDDDD</string>
                <key>fontStyle</key>
                <string></string>
                <key>foreground</key>
                <string>#000000</string>
            </dict>
        </dict>

I pasted this snippet to my .tmTheme file and diff color highlighting started to work.

In fact, I made a color theme called GithubCleanWhite which is similar to the Github color theme, has a white background, a grey unobtrusive color for comments, bold and italic font styles, a color for BracketHighlighter to use and the above snippet for diff color highlighting. You can see a screenshot below:

You can take a better look on Colorsublime page. You can install it using the Colorsublime package within ST3.