I can see lots of places to change colours in the first design.
I keep the blocks in just the one colour way in these designs so the focus is on the design, but that doesn’t stop me thinking about changes which could be made.
Apart from adding colour to some parts of the design, some of the parts of the blocks which are dark above could be changed to light. That wouldn’t make a lot of difference using Log Cabin blocks, but swapping the light and dark in Thick and Thin Log Cabin blocks makes for a whole new ball game.
Come to think of it, I haven’t mixed up the two variations used in these designs very often, though the one time I have mixed them up resulted in a project file with hundreds of designs.
The one above needs some other colours added to separate elements of the design.
The same design with the contrast swapped in all the blocks.
I see butterflies and birds in the last design for the day which could be picked out in different colours to make them feature.
I have just had another thought … could the shading be used inside out sometimes for special effects?