Change color dropdown

Hello,

how can I change the background color and font color of dropdowns?

<form class="woocommerce-shipping-calculator" action="/warenkorb/" method="post">

	<a href="#" class="shipping-calculator-button">Adresse ändern</a>
	<section class="shipping-calculator-form" style="display:none;">

					<p class="form-row form-row-wide" id="calc_shipping_country_field">
				<select name="calc_shipping_country" id="calc_shipping_country" class="country_to_state country_select" rel="calc_shipping_state">
					<option value="">Land auswählen&hellip;</option>
					<option value="AL">Albanien</option><option value="AD">Andorra</option><option value="BE">Belgien</option><option value="BA" selected='selected'>Bosnien und Herzegowina</option><option value="BG">Bulgarien</option><option value="DE">Deutschland</option><option value="DK">Dänemark</option><option value="EE">Estland</option><option value="FI">Finnland</option><option value="FR">Frankreich</option><option value="GR">Griechenland</option><option value="IE">Irland</option><option value="IS">Island</option><option value="IT">Italien</option><option value="HR">Kroatien</option><option value="LV">Lettland</option><option value="LI">Liechtenstein</option><option value="LT">Litauen</option><option value="LU">Luxemburg</option><option value="MT">Malta</option><option value="MD">Moldawien</option><option value="MC">Monaco</option><option value="ME">Montenegro</option><option value="NL">Niederlande</option><option value="MK">Nordmazedonien</option><option value="NO">Norwegen</option><option value="PL">Polen</option><option value="PT">Portugal</option><option value="RO">Rumänien</option><option value="SM">San Marino</option><option value="SE">Schweden</option><option value="CH">Schweiz</option><option value="RS">Serbien</option><option value="SK">Slowakei</option><option value="ES">Spanien</option><option value="CZ">Tschechien</option><option value="UA">Ukraine</option><option value="HU">Ungarn</option><option value="VA">Vatikanstadt</option><option value="GB">Vereinigtes Königreich</option><option value="BY">Weißrussland</option><option value="CY">Zypern</option><option value="AT">Österreich</option>				</select>
			</p>
		
					<p class="form-row form-row-wide" id="calc_shipping_state_field">
									<input type="text" class="input-text" value="" placeholder="Bundesland / Landkreis" name="calc_shipping_state" id="calc_shipping_state" />
								</p>
		
					<p class="form-row form-row-wide" id="calc_shipping_city_field">
				<input type="text" class="input-text" value="Hamburg" placeholder="Stadt" name="calc_shipping_city" id="calc_shipping_city" />
			</p>
		
					<p class="form-row form-row-wide" id="calc_shipping_postcode_field">
				<input type="text" class="input-text" value="21079" placeholder="Postleitzahl" name="calc_shipping_postcode" id="calc_shipping_postcode" />
			</p>
		
		<p><button type="submit" name="calc_shipping" value="1" class="button">Aktualisieren</button></p>
		<input type="hidden" id="woocommerce-shipping-calculator-nonce" name="woocommerce-shipping-calculator-nonce" value="90bb1c31e1" /><input type="hidden" name="_wp_http_referer" value="/warenkorb/" />	</section>
</form>