Are this plugs O.K or is there something wrong w/engine?

[solanog]

I check the plugs after a while and this is what I found:



They are different to what I'm used to, generally they are brownish but this ones are a little like orange in color.
What do you think, are they O.K, they are around 12000miles, they weren't worn since the gap was O.K. This is a 1990 LX Accord.
Do you see any problem with this or are they O.K?