How do I remove/change color of the line that goes around the block and ends up at the either side of the legend.blockTitle
The border is caused by the fieldset in each template page in your theme. You can change them like this: use an inline style in your theme templates like this:
<fieldset style="border: 0px;"> template content fieldset>
fieldset.custom {
border: 0px solid #fff;
}
<fieldset class="custom"> template content fieldset>
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