Use layered clothing and have some bright and
some drab clothing, on each trip. Then it is
your choice what you wear as an outer layer.

Under normal wilderness conditions, muted clothing
is best. Nobody wants to look out in nature and see
a bunch of orange, red, yellow clothing and packs.

For special activities like hunting, boating, Mountain-climbing,
Search and Rescue, you probably need bright clothing/gear.

You can buy a few bright colored covers or shells.
In the US, hunting vests are sold in blaze orange,
either polyester slick fabric or poly knit fabric;
they weigh next to nothing, and take up no room.

Europe might have a similar thing. If not, maybe you can
find some bright colors, cheap, at a thrift (second-hand) store.