如何在Sublime text 2中更改类属性的颜色？

Currently this is the code that highlights all variables, including class properties (they are red):

    <dict>
        <key>name</key>
        <string>Variables</string>
        <key>scope</key>
        <string>variable, support.variable</string>
        <key>settings</key>
        <dict>
            <key>fontStyle</key>
            <string></string>
            <key>foreground</key>
            <string>#dc322f</string>
        </dict>
    </dict>

How can I change the color of class properties only?

$object->property = 'xxx';

so $object should still be red, but I want property in a different color

variable.other.property should do the trick:

<dict>
    <key>name</key>
    <string>Variables</string>
    <key>scope</key>
    <string>variable.other.property</string>
    <key>settings</key>
    <dict>
        <key>fontStyle</key>
        <string></string>
        <key>foreground</key>
        <string>#00ff00</string>
    </dict>
</dict>

Change:

<string>variable, support.variable</string>

To:

<string>variable.other.property</string>