Green eyes do you already have a base tan?
If not I suggest a lotion with a high SPF. The sun in HI is much different than here in CA and you can easily burn there. Even those of darker skin types can burn.
If you already have a base I suggest still using a lotion with an SPF. Hawaiian Tropic Golden tanning with SPF 8.
Also I would pick up some SPF 15 as well. I would apply that once an hour or 1/2 an hour if you are in the water. I know you might think that the SPF won't get you tan with with the HI sun you don't want to burn. You will still get tan, I promise!
Also get a get one that is made for the face and use that on your face and shoulders.
Also check your pm's