hugo-theme-relearn/assets/css/theme-learn.css

:root {
    --MAIN-TEXT-color: rgba( 50, 50, 50, 1 ); /* Color of text by default */
    --MAIN-TITLES-TEXT-color: rgba( 94, 94, 94, 1 ); /* Color of titles h2-h3-h4-h5-h6 */
    --MAIN-TITLES-H1-TEXT-color: rgba( 34, 34, 34, 1 ); /* text color of h1 titles */
    --MAIN-LINK-color: rgba( 0, 189, 243, 1 ); /* Color of links */
    --MAIN-LINK-HOVER-color: rgba( 0, 130, 167, 1 ); /* Color of hovered links */
    --MAIN-BG-color: rgba( 255, 255, 255, 1 ); /* color of text by default */
    --MAIN-BOLD-font-weight: 800; /* font weight for bold text */

    --CODE-theme: learn; /* name of the chroma stylesheet file */
    --CODE-BLOCK-color: rgba( 226, 228, 229, 1 ); /* fallback color for code text */
    --CODE-BLOCK-BG-color: rgba( 40, 42, 54, 1 ); /* fallback color for code background */
    --CODE-BLOCK-BORDER-color: rgba( 40, 42, 54, 1 ); /* color of block code border */
    --CODE-INLINE-color: rgba( 94, 94, 94, 1 ); /* color for inline code text */
    --CODE-INLINE-BG-color: rgba( 255, 247, 221, 1 ); /* color for inline code background */
    --CODE-INLINE-BORDER-color: rgba( 251, 240, 203, 1 ); /* color of inline code border */

    --MENU-HOME-LINK-color: rgba( 224, 224, 224, 1 ); /* Color of the home button text */
    --MENU-HOME-LINK-HOVER-color: rgba( 240, 240, 240, 1 ); /* Color of the hovered home button text */

    --MENU-HEADER-BG-color: rgba( 132, 81, 161, 1 ); /* Background color of menu header */
    --MENU-HEADER-BORDER-color: rgba( 156, 111, 182, 1 ); /*Color of menu header border */

    --MENU-SEARCH-color: rgba( 255, 255, 255, 1 ); /* Color of search field text */
    --MENU-SEARCH-BG-color: rgba( 118, 72, 144, 1 ); /* Search field background color (by default borders + icons) */
    --MENU-SEARCH-BORDER-color: rgba( 145, 94, 174, 1 ); /* Override search field border color */

    --MENU-SECTIONS-ACTIVE-BG-color: rgba( 37, 31, 41, 1 ); /* Background color of the active section and its children */
    --MENU-SECTIONS-BG-color: rgba( 50, 42, 56, 1 ); /* Background color of other sections */
    --MENU-SECTIONS-LINK-color: rgba( 204, 204, 204, 1 ); /* Color of links in menu */
    --MENU-SECTIONS-LINK-HOVER-color: rgba( 230, 230, 230, 1 );  /* Color of links in menu, when hovered */
    --MENU-SECTION-ACTIVE-CATEGORY-color: rgba( 119, 119, 119, 1 ); /* Color of active category text */
    --MENU-SECTION-ACTIVE-CATEGORY-BG-color: rgba( 255, 255, 255, 1 ); /* Color of background for the active category (only) */

    --MENU-VISITED-color: rgba( 0, 189, 243, 1 ); /* Color of 'page visited' icons in menu */
    --MENU-SECTION-SEPARATOR-color: rgba( 42, 35, 47, 1 ); /* Color of <hr> separator in menu */

    /* base styling for boxes */
    --BOX-CAPTION-color: rgba( 255, 255, 255, 1 ); /* color of the title text */
    --BOX-BG-color: rgba( 255, 255, 255, .833 ); /* color of the content background */
    --BOX-TEXT-color: rgba( 16, 16, 16, 1 ); /* fixed color of the content text */
}

body a#R-logo,
body a#R-logo:hover,
body #R-logo svg,
body #R-logo svg * {
    color: var(--INTERNAL-MENU-SEARCH-color);
    fill: var(--INTERNAL-MENU-SEARCH-color) !important;
}