First you has to figure out, from which part of Poland then, your units are to come, where the regiment has been formed.
1 Legion
2 Legion
3 Legion
4 Legion
5 Legion
6 Legion
7 Legion
8 Legion
9 Legion
10 Galician
11 Rus
12 Galician
13 Rus
14 Galician
15 Rus
16 Galician
17 Galician
18 Galician
19 Galician
20 Galician
21 Rus
22 Rus
23 Legion ?
25 Rus
26 Rus
27 Rus
28 Iron - former Legion
29 Iron - former Legion
30 Iron - former Legion
31 Iron - former Legion
32 Ciechanow
33 Rus
34 Rus
35 Rus
36 Rus
37 Galician "Leczyca"
38 Galician
39 Galician
40 Galician
42 Lithau volunteers "Suwalki"
42 Blue Marcher Rifles
43 Haller US - American/Canadian uniforms
44 Haller US - American/Canadian uniforms
45 Haller US - American/Canadian uniforms
46 Blue - French uniforms
47 Blue - French uniforms
48 Blue - French uniforms
49 Blue - French uniforms
50 Haller US - American/Canadian uniforms
51 Haller blue
52 Haller blue
53 Haller blue
54 Haller blue
55 Poznan
56 Poznan
57 Poznan
58 Poznan
59 Poznan
60 Poznan
61 Poznan
62 Poznan
63 Poznan
64 Poznan
65 Poznan
67 Poznan
66 Poznan
68 Poznan
69 Poznan
70 Poznan 101 ?
101 Res
105 Res
106 res
133 Blue Marcher Rifles
145 Blue Marcher Rifles
149 Blue Marcher Rifles
155 Res. Poznan
157 Res. Poznan
159 Res. Poznan
201 Vol
202 Vol
205 Vol
if any of above has special interest, I can try finding out more, but it is an area, where there are no real sources, except perhaps in Polish archives and some small hints in books and from dated photos.
On that I can send a list, but of course that is no proof of uniform colours, as uniforms to great extents changed after, what to be organised. Generally companies/battalions were rather uniform in equipment and uniforms.
The Wielkopolska (area around Warsaw) uniforms German grey in different hues along the lines of the old PSZ. Their rogatywkas soft and in any possible and impossible shape. The early collar with the red-white stripes. Wezykes along the bottom of the collar only for former members of the legions.
The Poznan troops you know, they were the best uniformed and equipped of the lot, but slowly they loose their special characteristic details.
The Krakow troops from "Pilsudski land", "Legion land", Austrian uniform parts, brownish in any hues, but also stiffer rogatywkas, if not maciejowkas. Rather badly uniformed and equipped.
The eastern units, the worst equipped and uniformed, often Russian inspired, as that was from where, they could get resources, if not from Warsaw.
German and Austrian helmets could be worn by elites, like machine-gun companies.
Your picture of ! Wilno Regiment is a very good example of the uniform mess pre. September 1919, when distinctions and badges were decided on. The picture can be dated to shortly after September 1919 and the new regulations, as the officer has the new distinctions on his cap, but it seems not he has the new collar patch, only 2 gunners have the blue patch, even with the Legion wezyke. Side caps with and without eagle badge. Jackets in different colours with and without breast-pockets. You can go on and on, but that is how the Poles most often looked in the field.
French over-painted and Italian helmets for former Hallers Blue Army units.