Ellen,
About DOCTYPE and other html - it's redundant and invalid.
code<p><color="red"></font></p>/code - this is also wrong, cause
1) you are missing opening font tag
2) code<color="red">/code this is not an html, and with wrong styling
you have two ways to make this work:
1) change color during mapping:
a) open success mapping
b) add js (by clicking on green js button )for label you wish color to change
c) add:
if (value) {
$(element).css({'color':"#900"});
}
2) change color after mapping was complited:
a) add js code after mapping event for your service
b) in code you need to write jquery selector which finds all labels and changes color.