Of a color similar to that of a clear unclouded sky.(adjective)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "dark-blue" in a sentence
"The vehicle was described as a dark-blue, midsized pickup truck, possibly a Toyota, with a bench seat."
"Mr. Chirac, who has recently been seen cruising with his white poodle in a dark-blue limousine in central Paris and sipping piña coladas in the Mediterranean resort of Saint-Tropez, hasn't entirely retired from politics."
"Ever the stylist, Stewart said she can envision a tallit-inspired tablecloth, with dark-blue stripes with intricate silver trim."