Is it possible to make work LDR as color sensor?

ikelectro said:

Hi everyone,
As it seems to me that I have to fixed the light source,LDR and color object at fixed location. Because I'm observing that distance from LDR to object hugely affected the reading value.

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Yes, no matter what the light source, color, or detector is, the "inverse square law" will apply.

Ken

Just a suggestion, if you want to have an accurate idea of the color, you might want to consider a tri-color sensor from Taos semiconductor (now AMS). Their filters are accurate enough to calibrate displays used in color publishing, and the sensors themselves are inexpensive. As an example: **broken link removed**

Unfortunately that's barred (as per post #1)