If this is an indian recipe, the jalapenos will already be a (more or less well informed) substitution for one of the common types of green chili used in india, generally called hari mirch. Heat levels are reasonably similar comparing the two types. Generally, most types of green capsicum annuum will work (including green thai chilies. Mind the heat level, though!). Substituting capsicum chinese types (green habanero etc...) could change the flavor profile and would need experimentation; doing away with all green chilies and only using red will leave something missing - (dried or fresh, whole or powdered) red chilies are traditionally used together with green chilies in indian recipes.

If this is an indian recipe, the jalapenos will already be a (more or less well informed) substitution for one of the common types of green chili used in india, generally called hari mirch. Heat levels are reasonably similar comparing the two types. Generally, most types of green capsicum annuum will work (including green thai chilies. Mind the heat level, though!), but yield a subtle flavor difference. Substituting capsicum chinese types (green habanero etc...) could change the flavor profile and would need experimentation; doing away with all green chilies and only using red will leave something missing - (dried or fresh, whole or powdered) red chilies are traditionally used together with green chilies in indian recipes.