color sensor

i made a program for a color sensor and when i run it in arduino,i get values of red, blue and green colors, but when i pass a color in front of the sensor it doesn't show me any value in the arduino window, is it normal for now or if i pass a color in front of the sensor i should get a value , i attached a photo of the results i am having

image

We need to know a lot more.
What is your sensor? Please provide a link.
How have you wired it up? Please post a schematic.
What code are you running? Please provide your code - in code tags if you want a reply.