change highlight color

Hi
I’m trying the Gym demo. it has highlight color #d63d2d which I want to change across all elements to #0f81a1. I added to quick CSS :
strong {
color:#0f81a1 !important;
}
which did change tagged text to #0f81a1 however a P text block inside a color section with styling>font color set to Default is displayed as #0f81a1 yet is not tagged with . In the Bright Blue predefined color scheme the #0f81a1 color is defined as Alternate Background color
Why is the text block using #0f81a1?
Is iqucik css the proper way to go in order to change d63d2d to 0f81a1 across all elements? I could not find the d63d2d in a theme styelsheet and adding the code to child css stylesheet did not have any effect.
Thank you