Weights showing ONLY on blue and black, cant see other intensity colors.

My problem is exactly what is said in the title, the weights are shown only on absolutes black(for 0 weight), and blue (for More than 0), but i need to see the yellow- orange - red pattern to properly work on the model

Here’s a print

Thank you

well i restored factory defaults and its all showing now, maybe this happened because my model passed through various blender updates without changes