Help identifiying these burnt resistors

Are they open circuit? If not, measure their value. It may have shifted a little but it will put you in the ballpark.

If they are open, try measuring from one end to a part of the exposed helical resistance track. If you can't funny any of it, carefully scrape off some of the costing near the middle of the resistor. If you can get a reading from one end to the middle, you can double it as an estimate.

You might also try taking a picture against a white background so your camera screws with the colours less. That will make it much easier for the eagle eyed amongst us.

 

According to this Polish website these resistors are 5.6 Ω / 3 W.
5.6 Ω, 5 % would be > green | blue | gold | gold <. We can see the green band and two brown bands which could be meant to be gold. The second band, looking silver, should be blue. Can you confirm this by visual inspection? It could also be a variation of grey in which case the resistor would be 5.8 Ω. Not a crucial difference, I think.

These seem to burn quite often, so better replace by ones with a higher power rating, e.g. 5 W.

 

Resistors often shift in value when they get very hot, so a small difference is to be expected. It's also not unusual to have anything to to half an ohm in lead and contact resistance.

I would get a couple of 5.6Ω 5W resistors as replacements (as per Harald's suggestion).

When you mount them, leave them standing off the board by a couple of mm to both protect the boat from heat and to provide a little more airflow for cooling.