fgdata/gui/styles/AmbianceClassic/style.xml

<?xml version="1.0"?>

<PropertyList>
<!--
	<folders>
		<decoration type="string">decoration</decoration>
		<widgets    type="string">widgets</widgets>
	</folders>
-->
	<colors>

		<!-- Window decoration colors -->
		<title>
			<red   type="float">0.275</red>
			<green type="float">0.271</green>
			<blue  type="float">0.251</blue>
		</title>
		<title-unfocused>
			<red   type="float">0.235</red>
			<green type="float">0.231</green>
			<blue  type="float">0.216</blue>
		</title-unfocused>
		<title-text>
			<red   type="float">0.875</red>
			<green type="float">0.859</green>
			<blue  type="float">0.824</blue>
		</title-text>
		<title-text-unfocused>
			<red   type="float">0.502</red>
			<green type="float">0.490</green>
			<blue  type="float">0.471</blue>
		</title-text-unfocused>
		<title-highlight>
			<red   type="float">0.365</red>
			<green type="float">0.361</green>
			<blue  type="float">0.341</blue>
		</title-highlight>
		<title-highlight-unfocused>
			<red   type="float">0.278</red>
			<green type="float">0.275</green>
			<blue  type="float">0.259</blue>
		</title-highlight-unfocused>

		<!-- default colors for all GUI objects -->
		<bg_color>
			<red   type="float">0.949</red>
			<green type="float">0.945</green>
			<blue  type="float">0.941</blue>
		</bg_color>

		<fg_color>
			<red   type="float">0.298</red>
			<green type="float">0.298</green>
			<blue  type="float">0.298</blue>
		</fg_color>

		<text_color>
			<red   type="float">0.235</red>
			<green type="float">0.235</green>
			<blue  type="float">0.235</blue>
		</text_color>

		<backdrop_fg_color>
			<red   type="float">0.428</red>
			<green type="float">0.427</green>
			<blue  type="float">0.427</blue>
		</backdrop_fg_color>

		<button_bg_color>
			<red   type="float">0.949</red>
			<green type="float">0.945</green>
			<blue  type="float">0.941</blue>
		</button_bg_color>

		<button_backdrop_bg_color>
			<red   type="float">0.909</red>
			<green type="float">0.905</green>
			<blue  type="float">0.901</blue>
		</button_backdrop_bg_color>

		<button_bg_color_down>
			<red   type="float">0.88</red>
			<green type="float">0.87</green>
			<blue  type="float">0.86</blue>
		</button_bg_color_down>

		<button_bg_color_hover>
			<red   type="float">0.996</red>
			<green type="float">0.992</green>
			<blue  type="float">0.988</blue>
		</button_bg_color_hover>

		<button_bg_color_insensitive>
			<red   type="float">0.89</red>
			<green type="float">0.89</green>
			<blue  type="float">0.89</blue>
		</button_bg_color_insensitive>

	</colors>

</PropertyList>