.Object_A {}
.Object_B {}
.Object_C {}

.Icon .X {background-color:red}
.Icon .Y {background-color:green}

CLASS="Object_A X"
CLASS="Icon"
CLASS="Object_B Y"
CLASS="Icon"
CLASS="Object_C Y"
CLASS="Icon"
CLASS="Object_A Y"
CLASS="Icon"
CLASS="Object_B X"
CLASS="Icon"
CLASS="Object_C Y"
CLASS="Icon"
CLASS="Object_A Y"
CLASS="Icon"
CLASS="Object_B Y"
CLASS="Icon"
CLASS="Object_C X"
CLASS="Icon"
CLASS="Object_A Y"
CLASS="Icon"
CLASS="Object_B Y"
CLASS="Icon"
CLASS="Object_C Y"
CLASS="Icon"