Loaded colour palette is not exactly applied to the scene image

When loading a colour palette from file, with exact values and small steps between the values, the resulting image is not correct.

Example:
Colour palette
color1=White - sample=0
color2=Red - sample=0.01
color3=Blue - sample=0.0103
...

In the resulting image samples with values up to 0.09 are colour white.

An example colour palette is attached