Can not see color in preview?

I can not see color in Dynamo
any idea why?

Turn off the preview of the initial geometry node?

Turn off preview for “Sphere.ByCenterPointRadius”

I tested but then nothing is visible unless click on node
but then is selection blue color


Your alpha value is one - that’s practically invisible.

here is with lower value

You wanna go up. 255 is solid (0% transparency).

which value you are referring to ? Alpha?

Yes. The way I understand it Alpha is essentially opaqueness ranging from 0 to 255. 0 being completely transparent and 255 being completely opaque.

OK this worked