What I usually do is find out if there is black in the picture find it in the chart and see what number they use for that. I agree with the post above with out seeing the picture to see for sure I would say just drop the first number and it should be DMC .
Example 1310 would be 310 which is black in DMC. If the number for black is not DMC check it out against the numbers for Anchor floss and if they match then they are using Anchor and you then just need to convert from Anchor to DMC
I also agree with nours.
I just took a photo from the DMC, and these colors seem to be the same as shown in the color code.
Here is the picture, perhaps it may be helpful. :)