Hello Inoescu,

You need to use CSS code to do that. Any label can be changed

1: Identify your element with Chrome Inspect (right click into your page) to see the html "selector" of your object

here the selector is label#imObjectFirm_1_1_label (case sensitive)

So my CSS code by example will be to change color to blue and in bold

label#imObjectForm_1_1_label {
font-weight: bold;
color: blue;
}

You can do the same for other label like me with email, and the code will be to change color and size

label#imObjectForm_1_2_label {
color: green;
font-size: 20px;
}

Now you need to add these CSS codes inside WSX5:

2: Choose the page properties inside WSX5

3: And copy you CSS code here. Don't forget to put you code between <style> and </styles> tags

And you will be happy

Enjoy!
Axel