This is the 269th most frequent Czech word.
jaké
"What" or "which" (used for neuter singular).
Here, 'jaké' is an interrogative adjective asking about the kind (which/favorite type) of food.
Jaké je vaše oblíbené jídlo?
What is your favorite food?
In this context, 'jaké' asks about the specifics ('what') of the colors.
Nevím, jaké barvy se ti líbí.
I don't know what colors you like.
Here, 'jaké' refers to describing the characteristics or identity of the tools used.