Change color to white

[kina]

So I'm trying to change the blue areas on the garage of the below picture to white using Affinity Photo.  to match the rest of the garage and I've tried numerous different techniques I've learned from Youtube but white only turns the blue to gray.  Any advice/tips on how to match the blue areas to the white areas of the garage/house?

 

 

Edited May 8, 2020 by kina
added program

[Old Bruce]

Try HSL adjustment layer and play with the saturation way down and the lightness way up.

[v_kyr]

Those rect areas contain a bunch of different colored pixels not just blue tones.

[Jowday]

5 minutes ago, v_kyr said:

Those rect areas contain a bunch of different colored pixels not just blue tones.

Tolerance includes them all as well. But the feature replaces them with grey. All of them.

[v_kyr]

5 minutes ago, Jowday said:

Tolerance includes them all as well. But the feature replaces them with grey. All of them.

The color tolerance selection is currently too coarse or sensitive in affinity and does not apply properly.

[Jowday]

3 minutes ago, v_kyr said:

The color tolerance selection is currently too coarse or sensitive in affinity and does not apply properly.

Probably - in this case is works fine. But Photo replaces the color and does nothing more. It is a hue-placement.

[Jowday]

I am used to this interface in Photoshop... with options to correct lightness and saturation. Photoshop also struggles a little with this image. The grain certainly doesn't help either program.

[v_kyr]

In this case where those rect tiles are more or less pixel compositions of several different tonal colored pixels, one could also alternatively add a B&W layer (tiles would get black) for making/getting better area matching selections. Then taking the hopefully better and finer grade selections over to the color layer and replace/fill the selection color.

[hannah]

Not a re-colouring-answer : (As the question concerns just the tiles of the garage) so far the nicest looking for me, was stitching together a tile made of the white parts of the garage and putting them above the blue... looks convincing!?

 

 

 

[Jowday]

39 minutes ago, hannah said:

Not a re-colouring-answer : (As the question concerns just the tiles of the garage) so far the nicest looking for me, was stitching together a tile made of the white parts of the garage and putting them above the blue... looks convincing!?

 

If you can add a little similar noise/grain, yes. 🙂

[hannah]

10 minutes ago, Jowday said:

If you can add a little similar noise/grain, yes. 🙂

hahaha, I lost the grain somewhere down the line, you are right of course