For your second question, include this in your color theme (more info here ):
<dict> <key>name</key> <string>Embedded Ruby Source</string> <key>scope</key> <string>string source.ruby.embedded.source</string> <key>settings</key> <dict> <key>foreground</key> <string>#D01F1E</string> </dict> </dict>
Inclusion in:

For the first question, you can try this great tool to find out the keyword for method calls.
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