Mine usually looks something more akin to the Right Side of the fillet in your photo. That's how I usually envision fresh, grilled salmon cooked simply.
I'll sometimes get a bit more browned (lightly) on the surface for more lean and/or Red-Fleshed fish like wild-caught sockeye or King (Chinook) Salmon.
If I skin it before cooking and place it in one of those two-sided, flat grill baskets - that also gives me a bit more browning.
Then again - maybe the pics that you are attempting to duplicate may be more for SMOKED salmon than grilled, or perhaps the salmon was marinated in something like Teriyaki?
Cold-Smoked Salmon that is usually brined first (usually just simple salt and brown sugar) usually gets a bit of a "tanned" skin look to it as well.
In a large bowl about 3/4 full of water, keep adding salt and stirring to dissolve until a raw egg in the shell just barely floats
Then, add about 1 cup of Brown Sugar and dissolve that
add the salmon (steaked or fillets), cover, and refrigerate over night
Then, I usually smoke it for about 4 to 6 hours, depending on how thick it is over very low heat with some apple wood