The Ironic thing is that the pacific war had quite a variety of armor, and some of it quite as colorful as any German Ambush pattern.
Just off the top of my head the Marines used the M2A4, M3 and M3A1 on Guadalcanal, and both version of the M3 in later campaigns. They also used the M5A1 in the Marshals, and Marianas. They used M4A1s on Cape Gloucester (two color camouflaged), M4A2 mid production on Tarawa, the Marianas, Pelileu, and Iwo Jima; M4A2 late production in the Marianas and Okinawa and M4A3s on Iwo and Okinawa. The Marines also used 4 different varieties of personal carrying Amtrack (LVT-1 through -4) and 4 different fire support amtracks (LVT-(A)1 through (A)4). Also M3 Halftrack 75mm Gun Motor carriages, M7 and M7B1 Priests. Not to mention Jeeps, trucks, M29 Weasles and DUKWs.
The Army used the various M3 and M5 light tanks, M3 Lees on Makin, M4 (composite hull) M4A1 and M4A3 shermans, M4 (105mm) on Okinawa, M10 and M18 Tank Destroyers, and most of the varieties of LVTs.
I'm not an expert on Commonwealth forces but I know they used Matildas, Valentines, and Shermans(in Burma).
And the Japanese had an interesting variety of light and medium tanks, light artillery and self propelled guns, and is colorful camouflage.
No doubt there were few great clashes of massed armor, but there was still quite a variety.
As for Uniforms they could be as varied in the Pacific as in the ETO. Did you know that a substantial number of the Marines on Iwo Jima were wearing the Army khaki M41 field jacket over their green utilities. Both the Army and Marines had camouflage uniforms as well. And there were differences between the Japanese Army uniforms and those worn by the Special Naval Landing Teams ("Japanese Marines").