Don't overthink this :-)) Plant whatever colored flowering shrubs you like. Most only will be in bloom for a few weeks to a month at most so flower color is not a very limiting factor.

Personally, I'd go for contrast. Red looks great against that pale yellow and would really stand out. 'Hino Crimson' azaleas and red zonal geraniums?

Also go to the local nursery or big box store's nursery section. You will find that many plants come with all different flower colors, and some will even have different leaf colors or variations.

Which direction does the front of your house face?

Also keep in mind that it's easy to fill in gaps with plants all over the place when planting new, because empty space looks like it could use something there, but the bushes and plants will grow in time and you may not want crowded plants later. Of course, it's OK to remove plants later, too.