[Android Themes] Ticklefish:
That line certainly appears to be the one which controls the clear button. There's no other line that it could be. But the first thing we need to establish is whether we're using the right xml file.

Try this:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.phone.ExpandedView android:orientation="vertical" android:descendantFocusability="afterDescendants"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui">
<com.android.systemui.statusbar.policy.quicksetting.QuickSettingPanel android:orientation="horizontal" android:id="@id/quicksetting_container" android:visibility="gone" android:layout_width="wrap_content" android:layout_height="wrap_content" android:divider="@drawable/tw_black_bg" android:showDividers="middle" />
<com.wanam.systemui.quickpanel.PowerWidget android:id="@id/exp_power_stat" android:layout_width="fill_parent" android:layout_height="wrap_content" />
<RelativeLayout android:orientation="horizontal" android:background="@drawable/tw_plmn_bg" android:layout_width="fill_parent" android:layout_height="38.0dip" android:baselineAligned="false">
<com.android.systemui.statusbar.phone.CarrierLabel android:textSize="21.329987dip" android:textColor="#ffffffff" android:ellipsize="marquee" android:gravity="center_vertical" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginLeft="13.329987dip" android:layout_toLeftOf="@id/date" android:layout_alignParentLeft="true" />
<com.android.systemui.statusbar.policy.DateView android:textSize="19.329987dip" android:textColor="#ffffffff" android:gravity="center_vertical" android:id="@id/date" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="13.329987dip" android:singleLine="true" android:layout_alignParentRight="true" />
</RelativeLayout>
<LinearLayout android:orientation="horizontal" android:background="@drawable/notification_bg_divider" android:layout_width="fill_parent" android:layout_height="wrap_content" />
<LinearLayout android:orientation="horizontal" android:background="#ff000000" android:focusable="true" android:clickable="true" android:layout_width="fill_parent" android:layout_height="56.0dip">
<ImageView android:id="@id/brightness_icon" android:layout_width="25.0dip" android:layout_height="fill_parent" android:layout_marginLeft="12.0dip" android:src="@drawable/tw_quickpanel_icon_brightness" />
<com.android.systemui.statusbar.policy.ToggleSlider android:id="@id/brightness" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0" systemui:text="@string/status_bar_settings_auto_brightness_label" />
</LinearLayout>
<ScrollView android:id="@id/scroll" android:fadingEdge="none" android:layout_width="fill_parent" android:layout_height="fill_parent" android:overScrollMode="ifContentScrolls">
<FrameLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1.0">
<LinearLayout android:orientation="vertical" android:id="@id/scroll_layout" android:layout_width="fill_parent" android:layout_height="wrap_content">
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/settings_button" android:background="@drawable/tw_notification_row_bg" android:paddingTop="5.0dip" android:paddingBottom="5.0dip" android:focusable="true" android:visibility="gone" android:clickable="true" android:layout_width="fill_parent" android:layout_height="@dimen/notification_height">
<ImageView android:layout_width="@dimen/notification_icon_width" android:layout_height="@dimen/notification_icon_height" android:layout_marginLeft="@dimen/notification_icon_marginleft" android:src="@drawable/tw_quickpanel_icon_settings" android:layout_weight="0.0" android:contentDescription="@string/accessibility_settings_button" />
<TextView android:textSize="16.0dip" android:textStyle="bold" android:textColor="#ffffffff" android:id="@id/settings_button_text" android:paddingLeft="9.339996dip" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/status_bar_settings_settings_button" android:layout_weight="100.0" android:alpha="0.7" />
</LinearLayout>
<LinearLayout android:orientation="vertical" android:id="@id/noNotificationsTitle" android:layout_width="fill_parent" android:layout_height="26.669983dip">
<TextView android:textSize="16.669983dip" android:textStyle="bold" android:textColor="#ffffffff" android:gravity="left|center" android:id="@id/noNotificationsText" android:background="@drawable/tw_quickpanel_title_background" android:paddingLeft="13.329987dip" android:layout_width="fill_parent" android:layout_height="26.669983dip" android:text="@string/status_bar_no_notifications_title" />
</LinearLayout>
<LinearLayout android:orientation="vertical" android:id="@id/onGoingCart" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="wrap_content">
<TextView android:textSize="16.669983dip" android:typeface="sans" android:textColor="#ffffffff" android:gravity="left|center" android:id="@id/onGoingNotificationText" android:background="@drawable/tw_quickpanel_title_background" android:paddingLeft="13.329987dip" android:layout_width="fill_parent" android:layout_height="26.669983dip" android:text="@string/status_bar_ongoing_events_title" />
</LinearLayout>
<com.android.systemui.statusbar.policy.NotificationRowLayout android:id="@id/onGoingItems" android:focusable="true" android:layout_width="fill_parent" android:layout_height="wrap_content" systemui:rowHeight="@dimen/notification_height" />
<LinearLayout android:orientation="vertical" android:id="@id/notificationCart" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="wrap_content">
<FrameLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView android:textSize="16.669983dip" android:typeface="sans" android:textColor="#ffffffff" android:gravity="left|center" android:id="@id/latestNotificationText" android:background="@drawable/tw_quickpanel_title_background" android:paddingLeft="13.329987dip" android:layout_width="fill_parent" android:layout_height="26.669983dip" android:text="@string/status_bar_latest_events_title" />
<Button android:textSize="13.669983dip" android:textColor="#ffff0000" android:gravity="center" android:layout_gravity="right|center" android:id="@id/clear_all_button" android:background="@drawable/tw_btn_default_small" android:focusable="true" android:clickable="true" android:layout_width="wrap_content" android:layout_height="23.669983dip" android:layout_marginRight="13.329987dip" android:text="@string/status_bar_clear_all_button" android:contentDescription="@string/accessibility_clear_all" />
</FrameLayout>
</LinearLayout>
<com.android.systemui.statusbar.policy.NotificationRowLayout android:id="@id/notificationItems" android:focusable="true" android:layout_width="fill_parent" android:layout_height="wrap_content" systemui:rowHeight="@dimen/notification_height" />
<com.android.systemui.statusbar.policy.NotificationRowLayout android:id="@id/latestItems" android:layout_width="fill_parent" android:layout_height="wrap_content" systemui:rowHeight="@dimen/notification_height" />
</LinearLayout>
</FrameLayout>
</ScrollView>
</com.android.systemui.statusbar.phone.ExpandedView>

All I've done is change the text on the clear button to red. If your text stays white, then we're looking at either needing to edit a different xml file or changing the way you flash your modded apks back to your phone.