:root, :root.theme-light {
    --theme-blueberry-berry: #3584e4;
    /* --theme-blueberry-berry: #ac4;  */
    --theme-blueberry-dot: #444;
    --theme-blueberry-undecided: #ccc;
    --theme-blueberry-decided: #fff;
    --theme-blueberry-error-text: hotpink;
    --theme-blueberry-error-cell: pink;
    --theme-blueberry-block-outline: black;
    --theme-blueberry-clue-text-outside-board: #000;
    --theme-blueberry-clue-text-outside-board-satisfied: #0004;
}
:root.theme-dark { 
    --theme-blueberry-undecided: #bbb;
    --theme-blueberry-decided: #eee;
    --theme-blueberry-clue-text-outside-board: #ddd;
    --theme-blueberry-clue-text-outside-board-satisfied: #ddd4;
}