lib/src/main/java/com/shamanland/fab/FloatingActionButton.java
public void setColor(int color) {
        boolean changed = mColor != color || mColorStateList != null;

        mColor = color;
        mColorStateList = null;

        if (changed) {
            updateBackground();
        }
    }
public void setColor(int color) {
        boolean changed = mColor != color || mColorStateList != null;

        mColor = color;
        mColorStateList = null;

        if (changed) {
            updateBackground();
        }
    }
Sets background color for this button.
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Xml attribute: {@code app:floatingActionButtonColor}
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NOTE: this method sets the <code>mColorStateList</code> field to <code>null</code>

@param color color