Disguising Aquascaping putty

[Jigsaw82]

I did a little aquascaping for my tank with live rock and aquascaping putty. You can see the aquascaping putty in the attached pic. Does anyone have any ideas of how to make those white areas of putty look more like the surrounding rock?

 

[Sniperhank]

As the tank ages, algae and other stuff will grow on it and it'll look like the rest of the rock in the tank.

 

[Jigsaw82]

As the tank ages, algae and other stuff will grow on it and it'll look like the rest of the rock in the tank.

Thank you