What Are my Options After Implant Placement with Bone Grafting but the Area Above my Tooth is Not As Plump As Rest of Gums?

This can be a difficult problem especially if there is a high smile line.  Sometimes a connective tissue graft under the gingive will give the neded thickness but may resorb over time.  It is also possible to graft tissue from the tuberosity that is less likely to be lost.  

Another alternative is a custom abutment that has subgingival zirconia built out to support the tissue.  I am currently doing a very difficult base that is utilizing 2 implants with custom zirconia abutments that will have pink porcelain on the abutments and then the crowns will be fit without additional pik needed.

 

This gives a much more natural appearance and allows filling not just facial bulk but vertical deficiency

It would really help to see a picture of the area you are concerned about.  To plump the area you can have more bone graft in combination with gum graft. This might help mask the concavity that might be present in the area. It is difficult to say what treatment you might need without pictures/ examination of the site. Is the area dark because there is no bone covering the implant? So the titanium shows under the gum?  Is it showing dark because there is space between the gum and crown? The treatments will be different. So better to have the site evaluated   

Three options are currently recommended. A 1. connective tissue graft of your own tissue moved from one place, usually the palate or retromolar pad area, to the deficient area, 2. a bone graft, and 3. a hydroxyapetite filler that will not resorb. If there is enough bone and the keratinized tissue is adequate for an implant, the best is the 1st and 3rd options.

As you can see, implantology is complex, but in the hands of an experienced practitioner, the results are good.