Thank you for that! For others' reference, I used the following
.blog-item-wrapper .blog-item-content p a {
color: @accent;
background-repeat: repeat-x;
background-image: linear-gradient(to right,currentColor 180%,currentColor 0);
background-size: 1px 1px;
background-position: 0 100%;
white-space: initial;
}
to override all link styling in the blog post paragraphs, regardless of whether or not they were within the code block. In this case, @accent is assigned to the hex code of my palette accent color.