[FEATURE] Make Light Mode Less Eye Burning

[TheCedarPrince]

@AlphabetsAlphabets and @NTBBloodbath raised a good point that right now, the light mode is a bit jarring. I have defaulted to letting whoever access my site to run their own scripts or extensions to enable whatever sort of coloring they want, but it may be nice to have a better default. Here are some photo examples on how it could be improved:

This background color: #f7f3e3

The second uses this background color: #dddde7

For reference, here is the Franklin CSS that I can modify in the future to make things work:

/* ==================================================================
    VARIABLES
================================================================== */

:root {
    --background-color: hsl(0, 0%, 94%);
    --output-background: hsl(0, 0%, 98%);
    --small: 14px;
    --medium: 16px;
    --normal: 19px;
    --text-color: hsl(0, 0%, 20%);
}

/* ==================================================================
    DEFAULT FONT AND LAYOUT
================================================================== */

body,
html {
    font-family: Helvetica, Arial, sans-serif;
    font-size: var(--normal);
    color: var(--text-color);
    background-color:#f7f3e3;
}

/* ==================================================================
    FONT FOR CODE BLOCKS
================================================================== */

@font-face {
    font-family: JuliaMono-Medium;
    src: url("https://cdn.jsdelivr.net/gh/cormullion/juliamono/webfonts/JuliaMono-Medium.woff2");
}

/* ==================================================================
    BASIC GRID FOR PROFILE PIC
================================================================== */

.franklin-content .row {
    display: block;
}

.franklin-content .left {
    float: left;
    margin-right: 15px;
}

.franklin-content .right {
    float: right;
}

.franklin-content .container img {
    width: auto;
    padding-left: 0;
    border-radius: 10px;
}

.franklin-content .footnote {
    position: relative;
    top: -0.5em;
    font-size: 70%;
}

/* ==================================================================
    FOOT / COPYRIGHT
================================================================== */

.franklin-content .page-foot a {
    text-decoration: none;
    color: #a6a2a0;
    text-decoration: underline;
}

.page-foot {
    font-size: 80%;
    font-family: Arial, serif;
    color: #a6a2a0;
    text-align: center;
    margin-top: 6em;
    border-top: 1px solid lightgrey;
    padding-top: 2em;
    margin-bottom: 4em;
}

/* ==================================================================
    TEXT GEOMETRY
================================================================== */

.franklin-toc li {
    /* Avoid clickable elements being too close together. */
    margin: 0.6rem 0;
}

.franklin-content {
    position: relative;
    padding-left: 12.5%;
    padding-right: 12.5%;
    line-height: 1.35em;
}

/* On wide screens, fix content width to a max value. */

@media (min-width: 940px) {
    .franklin-content {
        width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* On narrow device, reduce margins. */

@media (max-width: 480px) {
    .franklin-content {
        padding-left: 6%;
        padding-right: 6%;
    }
}

/* ==================================================================
    TITLES
================================================================== */



.franklin-content {
  background: #f7f3e3;
}

.franklin-content h1 {
    font-size: 24px;
}

.franklin-content h2 {
    font-size: 22px;
}

.franklin-content h3 {
    font-size: 20px;
}

.franklin-content h1,
h2,
h3,
h4,
h5,
h6 {
    text-align: left;
}

.franklin-content h1 {
    padding-bottom: 0.5em;
    border-bottom: 3px double lightgrey;
    margin-top: 1.5em;
    margin-bottom: 1em;
}

.franklin-content h2 {
    padding-bottom: 0.3em;
    border-bottom: 1px solid lightgrey;
    margin-top: 2em;
    margin-bottom: 1em;
}

.franklin-content h1 a {
    color: inherit;
}

.franklin-content h1 a:hover {
    text-decoration: none;
}

.franklin-content h2 a {
    color: inherit;
}

.franklin-content h2 a:hover {
    text-decoration: none;
}

.franklin-content h3 a {
    color: inherit;
}

.franklin-content h3 a:hover {
    text-decoration: none;
}

.franklin-content h4 a {
    color: inherit;
}

.franklin-content h4 a:hover {
    text-decoration: none;
}

.franklin-content h5 a {
    color: inherit;
}

.franklin-content h5 a:hover {
    text-decoration: none;
}

.franklin-content h6 a {
    color: inherit;
}

.franklin-content h6 a:hover {
    text-decoration: none;
}

.franklin-content table {
    margin-left: auto;
    margin-right: auto;
    border-collapse: collapse;
    text-align: center;
}

.franklin-toc ol ol {
    list-style-type: lower-alpha;
}

.franklin-content th,
td {
    font-size: var(--small);
    padding: 10px;
    border: 1px solid black;
}

.franklin-content blockquote {
    background: var(--block-background);
    border-left: 7px solid #a8a8a8;
    margin: 1.5em 10px;
    padding: 0.5em 10px;
    font-style: italic;
}

.franklin-content blockquote p {
    display: inline;
}

/* ==================================================================
    GENERAL FORMATTING
================================================================== */

/* Spacing between bullet points. */

.franklin-content li p {
    margin: 10px 0;
}

.franklin-content a {
    color: #004de6;
    text-decoration: none;
}

.franklin-content a:hover {
    text-decoration: underline;
}

/* ==================================================================
    HYPERREFS AND FOOTNOTES
================================================================== */

.franklin-content .eqref a {
    color: green;
}

.franklin-content .bibref a {
    color: green;
}

.franklin-content sup {
    font-size: 70%;
    vertical-align: super;
    line-height: 0;
}

.franklin-content table.fndef {
    margin: 0;
    margin-bottom: 10px;
}

.franklin-content .fndef tr,
td {
    padding: 0;
    border: 0;
    text-align: left;
}

.franklin-content .fndef tr {
    border-left: 2px solid lightgray;
}

.franklin-content .fndef td.fndef-backref {
    vertical-align: top;
    font-size: 70%;
    padding-left: 5px;
}

.franklin-content .fndef td.fndef-content {
    font-size: 80%;
    padding-left: 10px;
    width: 100%;
}

/* ==================================================================
    IMAGES in CONTENT
================================================================== */

.franklin-content img {
    width: 95%;
    text-align: center;
    padding-left: 2.5%;
    padding-right: 2.5%;
}

.franklin-content .img-small img {
    width: 50%;
    text-align: center;
    padding-left: 20%;
}

.franklin-content .center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 80%;
}

/* ==================================================================
    KATEX
================================================================== */

body {
    counter-reset: eqnum;
}

.katex {
    font-size: 1em !important;
}

.katex-display .katex {
    /* Overwrite KaTeX settings. */
    display: inline-block;
    /* Allow display equations to wrap on small screens. */
    white-space: normal;
}

.katex-display::after {
    counter-increment: eqnum;
    content: "(" counter(eqnum) ")";
    position: relative;
    float: right;
    padding-right: 5px;
}

.nonumber .katex-display::after {
    counter-increment: nothing;
    content: "";
}

/* ==================================================================
    CODE & HIGHLIGHT.JS
================================================================== */

code {
    padding: 0.1em 0.2em;
    border-radius: 2px;
    font-size: var(--medium);
    font-family: JuliaMono-Medium;
}

/* .franklin-content code { */

/* background-color: rgba(27,31,35,0.05); */

/* padding: 0.1em 0.2em; */

/* border-radius: 2px; */

/* font-size: 90%; } */

.hljs {
    font-size: var(--small);
    line-height: 1.35em;
    border-radius: 10px;
}

.hljs-meta,
.hljs-metas,
.hljs-metap {
    font-weight: bold;
}

.hljs-meta {
    color: rgb(25, 179, 51);
}

.hljs-metas {
    color: red;
}

.hljs-metap {
    color: rgb(51, 131, 231);
}

.code-output {
    background: var(--output-background);
    border: 1px dashed #dbdbdb;
}

/* ==================================================================
    BOXES
================================================================== */

.franklin-content .colbox-blue {
    background-color: #eef3f5;
    padding-top: 5px;
    padding-right: 10px;
    padding-left: 10px;
    padding-bottom: 5px;
    margin-left: 5px;
    margin-top: 5px;
    margin-bottom: 5px;
    border-radius: 0 10px 10px 0;
    border-left: 5px solid #4c9cf1;
}

/* ==================================================================
    DARKMODE STYLING
================================================================== */

/* 

NOTE: The following settings copy the Gruvbox style (dark) (c) Pavel Pertsev (original style at https://github.com/morhetz/gruvbox) design -- additionally, credit to Fredrik Ekre for this Franklin adaptation.

*/

.darkmode--activated p,
.darkmode--activated h1,
.darkmode--activated h2,
.darkmode--activated h3,
.darkmode--activated h4,
.darkmode--activated h5,
.darkmode--activated span,
.darkmode--activated li,
.darkmode--activated td,
.darkmode--activated ol {
    color: #ECEFF4;
}

.darkmode--activated .hljs,
.darkmode--activated .franklin-content,

.darkmode--activated .hljs-subst {
  display: block;
  overflow-x: auto;
  padding: 0.5em;
  background: #282828;
  color: #ebdbb2;
}

/* Gruvbox Red */
.darkmode--activated .hljs-deletion,
.darkmode--activated .hljs-formula,
.darkmode--activated .hljs-keyword,
.darkmode--activated .hljs-link,
.darkmode--activated .hljs-selector-tag {
  color: #fb4934;
}

/* Gruvbox Blue */
.darkmode--activated .hljs-built_in,
.darkmode--activated .hljs-emphasis,
.darkmode--activated .hljs-name,
.darkmode--activated a,
.darkmode--activated .hljs-quote,
.darkmode--activated .hljs-strong,
.darkmode--activated .hljs-title,
.darkmode--activated .hljs-variable {
  color: #83a598;
}

/* Gruvbox Yellow */
.darkmode--activated .hljs-attr,
.darkmode--activated .hljs-params,
.darkmode--activated .hljs-template-tag,
.darkmode--activated .hljs-type {
  color: #fabd2f;
}

/* Gruvbox Purple */
.darkmode--activated .hljs-builtin-name,
.darkmode--activated .hljs-doctag,
.darkmode--activated .hljs-literal,
.darkmode--activated .hljs-number {
  color: #8f3f71;
}

/* Gruvbox Orange */
.darkmode--activated .hljs-code,
.darkmode--activated .hljs-meta,
.darkmode--activated .hljs-regexp,
.darkmode--activated .hljs-selector-id,
.darkmode--activated .hljs-template-variable {
  color: #fe8019;
}

/* Gruvbox Green */
.darkmode--activated .hljs-addition,
.darkmode--activated .hljs-meta-string,
.darkmode--activated .hljs-section,
.darkmode--activated .hljs-selector-attr,
.darkmode--activated .hljs-selector-class,
.darkmode--activated .hljs-string,
.darkmode--activated .hljs-symbol {
  color: #b8bb26;
}

/* Gruvbox Aqua */
.darkmode--activated .hljs-attribute,
.darkmode--activated .hljs-bullet,
.darkmode--activated .hljs-class,
.darkmode--activated .hljs-function,
.darkmode--activated .hljs-function .hljs-keyword,
.darkmode--activated .hljs-meta-keyword,
.darkmode--activated .hljs-selector-pseudo,
.darkmode--activated .hljs-tag {
  color: #8ec07c;
}

/* Gruvbox Gray */
.darkmode--activated .hljs-comment {
  color: #928374;
}

/* Gruvbox Purple */
.darkmode--activated .hljs-link_label,
.darkmode--activated .hljs-literal,
.darkmode--activated .hljs-number {
  color: #d3869b;
}

.darkmode--activated .hljs-comment,
.darkmode--activated .hljs-emphasis {
  font-style: italic;
}

.darkmode--activated .hljs-section,
.darkmode--activated .hljs-strong,
.darkmode--activated .hljs-tag {
  font-weight: bold;
}

.darkmode--activated blockquote {
    background-color: #282828;
}

.darkmode-toggle {
    z-index: 500;
}

/* ==================================================================
    LUNR STYLING
================================================================== */

.result-title a {
    text-decoration: none;
}

.result-title a:hover {
    text-decoration: underline;
}

.result-preview {
    color: #808080;
}

.resultCount {
    color: #808080;
}

.result-query {
    font-weight: bold;
}

#lunrSearchForm {}

Good little project to come back to someday in the future!