XF 1.5 Custom button for linking

[Senpai]

hey XF members im trying to create a button that will let someone redirect to another site

but i want to use the same button as my style how can i do that pictures of how mine looks

thats my actual style button

and when i try to make my own and put it in account upgrades page thats how it looks .. can someone tell me how to use as the blue one my actual button style