i'll go with Denim (Ultramarine is too strong)...gold and blue looks very nice in my eyes together.
Seems that google and chatgpt agree:
Blue and gold are a classic and elegant color combination that works well together in various settings, from interior design to fashion. The reason these colors complement each other lies in their contrasting qualities:
• Blue is a cool, calming color that evokes feelings of tranquility and stability.
• Gold is a warm, vibrant, and luxurious color, associated with wealth and sophistication.
When paired, the coolness of blue tones down the intensity of gold, while the richness of gold adds warmth and elegance to blue, creating a balanced and visually appealing contrast. Whether you’re designing a room, a logo, or an outfit, blue and gold can be a striking and harmonious duo.