if i have 3 characters sharing a non-generic keyword will that be a theam team for a 500 pt. team

ex.
WL Sinestro 249
WL Flash 138
WL Ice 94
WL object 5

Total: 486 points, is it a theme?

At 500 points you need either 4 non-generic or 5 generic characters

Point total
of force - characters
1-150 = 1
151-300 = 2
301-450 = 3
451-600 = 4

That won't do.

For generic KWs you need 1 figure for every 100 points of the build.

For non-generic KWs you need 1 figure for every 150 points of the build.

When you figure it out, you round up.

500 / 150 = 3.333...

3.333... rounded up = 4 figures needed.

Rather than dividing, try thinking about it this way.

If you're building a non-generic keyword theme team, multiple the number of characters you have by 150. In your case, this gives you 450. 450 is not 500 or larger, so you do not have a theme team yet.