Because we are using Complementary colors (which can create MUD if blended together) we will place the color mixes, side by side and blend at just the edges where any two mixes touch.
Upper Left: UMB + Th B + tch CadRedLt. + tch White This mix gets lighter & narrower at the /right side
Next Section on Right: CadRedLt +CYMed+ CYLt (orange). Blend these 2 sections together at the meeting edge.
Then below that: Cad Yellow Lt + White. Don’t forget the SUN, which is White, softened & blended out into the rest of that section. Blend this top edge into the one above.
Area from the Right: Orange (mix from above) + tch White Blend top edge into one above.
Area just above horizon line: CadYellowLt + Cad YellowMed. Blend into section above it.
Then if more subtle blending is needed, you may MIST w/ water & blend lightly, color mix to color mix. Not too much water.