Change Part Color Code 1 for Dark Bluish Gray Color to {4235339}
Note: These track parts appear to be assemblies. Looks like some electrical conductors might be attached to the track itself. I found Design ID 74746 with Element ID 4235339 for color 199 Dark Stone Gray.
For Dark Gray, please add ID 74746 as an Element ID. Do not add 286527 or 4192045. Those two IDs appear to belong to the track minus the conductors. Have a look at the other track pieces, but please do not add any IDs until I've confirmed which ones should be added here.
Please do not add 4210930. I believe 4190054 belongs to this assembly, but I'll add that one myself once I can confirm that. Thanks!