Well the numbers after the word colour refere to the palette colour (As in what colour to use in paintshop.photoshop). As in red, green blue. So 0 0 0 would be white and 255 255 255 black

As for your problem....well my guess would be in the climate TGA you have the wrong palette colour in that area (as in it should be 247 148 29 exactly, even 1 number out can cause these problems)

Or it might be in the ground type TGA (but my 1st impulse is to say check your climate TGA as if it is reading ok as dense forest then that sounds like it'll be ok)

Hope that helps a bit