My Transplanted Hair is Brown, While My Hair is Normally Blonde

I had a hair transplant and the new hair is dark blonde/light brown color, but my top hair is light blonde, so every transplanted hair is much darker and is freaky. I was told this would lighten over time and would eventually grow in the same as my normal top hair color which is light blonde. Can I believe this?

When hair is transplanted, it will be thick shafted, just like the original hair in the back of the head (which usually gets less sun than hair on the top). Your blonde native hair in the recipient area will be miniaturized, so they will be blonder than the transplanted hairs, simply because miniaturized hair has less pigment and is easily bleached by the sun. You may have to dye the transplanted hair just to make it match. Assuming you are a typical summer blonde, the transplanted hair may blonde during the summer months. If you fill out the balding area eventually, then the blend will return more to a normal, where frontal hair gets sun exposure and more blonde as a result.