Modification for monokai theme for JSON files - edit ~/Library/Application Support/Sublime Text 2/Packages/Color Scheme - Default/Monokai.tmTheme

gistfile1.xml

<dict>
			<key>name</key>
			<string>JSON String</string>
			<key>scope</key>
			<string>meta.structure.dictionary.json string.quoted.double.json</string>
			<key>settings</key>
			<dict>
				<key>foreground</key>
				<string>#E6DB74</string>
			</dict>
		</dict>
		<dict>
			<key>name</key>
			<string>JSON :</string>
			<key>scope</key>
			<string>punctuation.separator.dictionary.key-value.json</string>
			<key>settings</key>
			<dict>
				<key>foreground</key>
				<string>#F92672</string>
			</dict>
		</dict>
		<dict>
			<key>name</key>
			<string>JSON ,</string>
			<key>scope</key>
			<string>punctuation.separator.dictionary.pair.json, punctuation.separator.array.json</string>
			<key>settings</key>
			<dict>
				<key>foreground</key>
				<string>#F92672</string>
			</dict>
		</dict>
		<dict>
			<key>name</key>
			<string>JSON { } [ ]</string>
			<key>scope</key>
			<string>punctuation.definition.array.begin.json, punctuation.definition.array.end.json, punctuation.definition.dictionary.begin.json, punctuation.definition.dictionary.end.json</string>
			<key>settings</key>
			<dict>
				<key>foreground</key>
				<string>#ffffff</string>
			</dict>
		</dict>