Good evening, @yartydesign.
I popped in at lunch but didn’t have time to respond.
I am very glad this was helpful. I see the difference in the lighting and the detail in the blue band of clouds shows much better; but I think I agree about the colors. This is where references may come in handy. References are not necessarily there to copy, of course, but to see how various shapes and shadows and lights play in different ways to help you “see” your own image and how it comes together. So what type of landscape is common where this takes place? Snag some free pix or look up some sunsets (or different times of day) for ideas about how clouds on the horizon might play out for you. you can still have the bands like you do but it may give you some more ideas about how to get the rest of the way there.
This may also help a bit as well, there are a number of links where artists share some of their tips on how to color gray scale. They do different things, but here’s one for an example.
Art Rocket Article - Marco Bucci
I find myself doing something similar, at least in a basic way. There is an example in this link below where I use a canvas layer for texture like canvas or paper depending on what I’m doing. then a pencil layer where the grayscale goes. Then a paint layer. When it comes to the paint layer, I simply pick one color and use that for that object. With the blending layers, you can look for the type of effect you might need, like a multiply, which darkens colors where the grayscale is at. I like the grain merge in my case as it blends the canvas with the pencil layer and that is also set to grain merge to the paint layer for a kinda of old timey printed illustration dithering kinda of thing. And its still a multiply function so it darkens the color as the shading gets heavier in the pencil layer.
Of course, there are many great examples in this link from the other artists that show case different takes on lighting and tone/value.
Krita - April Monthly Challenge
Of course, Simply mixing colors will also get you there and its good practice to remember or learn primary colors and the color wheel. Yellow and blue make green. And what shade of green? depends on the percentage of yellow and blue.
Anyway, I’m off to my next project. I look forward to seeing the result when it’s ready.
Good luck
HL