我直接发个代码吧
代码故梦创作

<script>
/*
* 2021年1月2日23:34:26
* 故梦
* admin@gmit.vip
*/
function sjcolor(){
    var colorArr = ["#428BCA", "#AEDCAE", "#ECA9A7", "#DA99FF", "#FFB380", "#D9B999", "#3bca6e", "#f23232", "#834e75", "#23b7e5", "#f60"];
    
    document.querySelectorAll("#aside > div > div.navi-wrap.scroll-y.scroll-hide > nav > ul > li > a > span").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#aside > div > div.navi-wrap.scroll-y.scroll-hide > nav > ul > li > ul > li > a > span").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#aside > div > div.navi-wrap.scroll-y.scroll-hide > nav > ul > li > ul > li > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#aside > div > div.navi-wrap.scroll-y.scroll-hide > nav > ul > li > ul > li > a > b").forEach(e => {
        e.style.backgroundColor = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#post-panel > div > div > div > div.panel-body > div.nav-tabs-alt > ul > li > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#post-panel > div > div > div > div").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#post-panel > div.blog-post > div > div.post-meta.wrapper-lg > h2 > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#small_widgets > h1").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#small_widgets > ul").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#content > main > div > div > div > h1").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#search_input").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#content > main > div > div > h1").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#content > main > div > div > div > div a >span").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#header > div > ul > li > div > div > div > div > div > div > a > span > span").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#tag_toc > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#content > main > div > div > header > h1").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#typedWord").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#tag_cloud-2 h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#tag_cloud-2 a").forEach(e => {
        e.style.backgroundColor = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#blog_info > ul > li > span.badge.pull-right").forEach(e => {
        e.style.backgroundColor = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#blog_info > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-hots > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-hots > ul > li > div > h4 > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-hots > ul > li > div > small > span > span.meta-value").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#widget-tabs-4-comments > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-comments > ul > li > div > div > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-comments > ul > li > div > small > span").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#widget-tabs-4-random > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-random > ul > li > div > h4 > a").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    document.querySelectorAll("#widget-tabs-4-random > ul > li > div > small > span > span.meta-value").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
    document.querySelectorAll("#sidebar > section.widget.widget_categories.wrapper-md.clear.visible-lg.visible-md > h5").forEach(e => {
        e.style.color = colorArr[Math.floor(Math.random() * colorArr.length)];
    });
    
}sjcolor();
</script>

把这代码放在handsome模板的footer.php即可
然后把sjcolor();加到pjax回调函数里 不然页面加载之后颜色就没了