dark.css

:root {
	--main-background-color: #353535;
	--main-color: #ddd;
	--settings-input-color: #2196f3;
	--sidebar-background-color: #505050;
	--sidebar-background-color-hover: #676767;
	--code-block-background-color: #2A2A2A;
	--scrollbar-track-background-color: #717171;
	--scrollbar-thumb-background-color: rgba(32, 34, 37, .6);
	--scrollbar-color: rgba(32,34,37,.6) #5a5a5a;
	--headings-border-bottom-color: #d2d2d2;
	--border-color: #e0e0e0;
	--button-background-color: #f0f0f0;
	--right-side-color: grey;
	--code-attribute-color: #999;
	--toggles-color: #999;
	--search-input-focused-border-color: #008dfd;
	--copy-path-button-color: #999;
	--copy-path-img-filter: invert(50%);
	--copy-path-img-hover-filter: invert(65%);
	--codeblock-error-hover-color: rgb(255, 0, 0);
	--codeblock-error-color: rgba(255, 0, 0, .5);
	--codeblock-ignore-hover-color: rgb(255, 142, 0);
	--codeblock-ignore-color: rgba(255, 142, 0, .6);
	--type-link-color: #2dbfb8;
	--trait-link-color: #b78cf2;
	--assoc-item-link-color: #d2991d;
	--function-link-color: #2bab63;
	--macro-link-color: #09bd00;
	--keyword-link-color: #d2991d;
	--mod-link-color:  #d2991d;
	--link-color: #d2991d;
	--sidebar-link-color: #fdbf35;
	--sidebar-current-link-background-color: #444;
	--search-result-link-focus-background-color: #616161;
	--stab-background-color: #314559;
	--stab-code-color: #e6e1cf;
}

.slider {
	background-color: #ccc;
}
.slider:before {
	background-color: white;
}
input:focus + .slider {
	box-shadow: 0 0 0 2px #0a84ff, 0 0 0 6px rgba(10, 132, 255, 0.3);
}

.rust-logo {
	filter: drop-shadow(1px 0 0px #fff)
		drop-shadow(0 1px 0 #fff)
		drop-shadow(-1px 0 0 #fff)
		drop-shadow(0 -1px 0 #fff)
}

.src-line-numbers span { color: #3B91E2; }
.src-line-numbers .line-highlighted {
	background-color: #0a042f !important;
}

.content .item-info::before { color: #ccc; }

pre.rust .comment { color: #8d8d8b; }
pre.rust .doccomment { color: #8ca375; }

body.source .example-wrap pre.rust a {
	background: #333;
}

details.rustdoc-toggle > summary::before {
	filter: invert(100%);
}

.search-input {
	color: #111;
}

#crate-search-div::after {
	/* match border-color; uses https://codepen.io/sosuke/pen/Pjoqqp */
	filter: invert(94%) sepia(0%) saturate(721%) hue-rotate(255deg) brightness(90%) contrast(90%);
}
#crate-search:hover, #crate-search:focus {
	border-color: #2196f3 !important;
}
#crate-search-div:hover::after, #crate-search-div:focus-within::after {
	filter: invert(69%) sepia(60%) saturate(6613%) hue-rotate(184deg) brightness(100%) contrast(91%);
}

.src-line-numbers :target { background-color: transparent; }

/* Code highlighting */
pre.rust .kw { color: #ab8ac1; }
pre.rust .kw-2, pre.rust .prelude-ty { color: #769acb; }
pre.rust .number, pre.rust .string { color: #83a300; }
pre.rust .self, pre.rust .bool-val, pre.rust .prelude-val,
pre.rust .attribute { color: #ee6868; }
pre.rust .macro, pre.rust .macro-nonterminal { color: #3E999F; }
pre.rust .lifetime { color: #d97f26; }
pre.rust .question-mark {
	color: #ff9011;
}

pre.example-line-numbers {
	border-color: #4a4949;
}

a.test-arrow {
	color: #dedede;
	background-color: rgba(78, 139, 202, 0.2);
}

a.test-arrow:hover{
	background-color: #4e8bca;
}

:target {
	background-color: #494a3d;
	border-right: 3px solid #bb7410;
}

.search-failed a {
	color: #0089ff;
}

.tooltip::after {
	background-color: #000;
	color: #fff;
	border-color: #000;
}

.tooltip::before {
	border-color: transparent black transparent transparent;
}

.notable-traits-tooltiptext {
	background-color: #111;
}

#titles > button:not(.selected) {
	background-color: #252525;
	border-top-color: #252525;
}

#titles > button:hover, #titles > button.selected {
	border-top-color: #0089ff;
	background-color: #353535;
}

#titles > button > div.count {
	color: #888;
}

kbd {
	color: #000;
	background-color: #fafbfc;
	box-shadow: inset 0 -1px 0 #c6cbd1;
}

#settings-menu > a, #help-button > button {
	color: #000;
}

#settings-menu > a:hover, #settings-menu > a:focus,
#help-button > button:hover, #help-button > button:focus {
	border-color: #ffb900;
}

.search-results .result-name span.alias {
	color: #fff;
}
.search-results .result-name span.grey {
	color: #ccc;
}

#source-sidebar div.files > a:hover, details.dir-entry summary:hover,
#source-sidebar div.files > a:focus, details.dir-entry summary:focus {
	background-color: #444;
}
#source-sidebar div.files > a.selected {
	background-color: #333;
}

.scraped-example-list .scrape-help {
	border-color: #aaa;
	color: #eee;
}
.scraped-example-list .scrape-help:hover {
	border-color: white;
	color: white;
}
.scraped-example .example-wrap .rust span.highlight {
	background: rgb(91, 59, 1);
}
.scraped-example .example-wrap .rust span.highlight.focus {
	background: rgb(124, 75, 15);
}
.scraped-example:not(.expanded) .code-wrapper:before {
	background: linear-gradient(to bottom, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0));
}
.scraped-example:not(.expanded) .code-wrapper:after {
	background: linear-gradient(to top, rgba(53, 53, 53, 1), rgba(53, 53, 53, 0));
}
.toggle-line-inner {
	background: #999;
}
.toggle-line:hover .toggle-line-inner {
	background: #c5c5c5;
}