Based on your query regarding significant historical and contemporary themes related to Ukraine, including the Act of Unity (Акт Злуки), the concept of National Unity (Соборність), the Ukrainian Revolution of the 20th century, and the modern Ukrainian-Russian conflict, I have created a color palette that reflects patriotism, struggle, and resilience.

 <Unity and Struggle>
1. Ukrainian Blue - 
                            
                            #005EB8
                         - A strong blue that represents the sky and symbolizes freedom and independence, central to Ukrainian identity.
2. Golden Yellow - 
                            
                            #FFD700
                         - A bright yellow representing the fields of wheat, symbolizing prosperity, hope, and the richness of Ukrainian culture.
3. Deep Red - 
                            
                            #A50034
                         - A bold red that evokes the passion and sacrifice associated with historical struggles and the fight for sovereignty.
4. Olive Green - 
                            
                            #6B8E23
                         - A muted green that represents resilience and strength, reflecting the spirit of the Ukrainian people in times of conflict.
5. Steel Grey - 
                            
                            #7D7F7D
                         - A strong grey that symbolizes the modern challenges and complexities faced during the ongoing war, representing determination and endurance.

This color palette can be effectively used in educational materials, commemorative graphics, or campaigns that focus on Ukrainian history, unity, and resilience.

How do you plan to use this palette in your project? Would you like recommendations for specific design approaches or themes to explore further?