I updated my CSS for Jolpin 
/* userchrome.css */
:root {
--white: #e9edf0;
--light-grey: #b1bcc2;
--grey: #3D444E;
--dark-grey: #222222;
--black: #050017;
--red-light: #fad3d4;
--red: #f65354;
--red-dark: #FF1744;
--green-light: #c5e5b4;
--green: #58D68D;
--green-dark: #23CD60;
--yellow-light: #faf3d3;
--yellow: #E7AE1D;
--yellow-dark: #E7AE1D;
--blue-light: #bed3fc;
--blue: #02A4F1;
--blue-dark: #3a79f7;
--purple-light: #C792EA;
--purple: #F459F4;
--purple-dark: #F459F4;
--aqua-light: #70ecec;
--aqua: #1fdfdf;
--aqua-dark: #00A3A3;
--aqua-darker: #007c7c;
--orange-light: #faf3d3;
--orange: #cf7506;
--orange-dark: #E7AE1D;
}
div.sidebar {
background-color: #2E3138 !important;
}
div.sidebar .list-item-container.selected {
background: #616161;
}
div.sidebar .list-item-container:hover {
background: #4E4E4E !important;
}
div.sidebar .list-item-container a.list-item > span:not(.title):not(.tag-label) {
font-size: 15px !important;
width: 25px;
text-align: center;
}
div.sidebar button {
font-size: 13px;
}
div.sidebar button:hover {
background: #4E4E4E !important;
}
div.sidebar button span.icon-sync {
font-size: 15px;
}
div.rli-noteList button.new-todo-button,
div.rli-noteList button.new-note-button {
background-color: var(--white);
opacity: .5;
}
div.rli-noteList button.sort-order-reverse-button span,
div.rli-noteList span.user_updated_time,
div.rli-noteList span.icon-search {
color: var(--white);
opacity: .5;
}
div.note-list .list-item-container,
div.note-list > div:last-of-type {
height: 30px !important;
}
div.note-list .list-item-container::before {
border: none;
}
div.note-list .list-item-container > a {
font-size: 13px !important;
}
.ace_heading {
font-weight: bold;
}
.CodeMirror .cm-header.cm-header-1,
.CodeMirror .cm-header.cm-header-2,
.CodeMirror .cm-header.cm-header-3,
.CodeMirror .cm-header.cm-header-4,
.CodeMirror .cm-header.cm-header-5,
.CodeMirror .cm-header.cm-header-6 {
color: var(--aqua-dark);
}
.CodeMirror .cm-strong {
color: var(--aqua-light) !important;
}
.ace-twilight .ace_list,
.ace-twilight .ace_markup.ace_list,
.ace-twilight .ace_storage {
color: var(--white) !important;
}
.ace-twilight .ace_support.ace_function { color: #aaa !important; }
.ace-twilight .ace_variable { color: var(--red-dark) !important; }
.cm-s-material-darker .cm-variable-3, .cm-s-material-darker .cm-type {
color: var(--white) !important;
}
/* Links */
.cm-s-material-darker .cm-link-text {
color: var(--purple-light) !important;
}
.cm-s-material-darker .cm-string {
color: var(--green-dark) !important;
}
.cm-s-material-darker .cm-meta {
color: var(--green-dark) !important;
}
.cm-s-material-darker .cm-property {
color: var(--aqua-dark) !important;
}
.cm-tabcolor-row {
color: var(--joplin-color) !important;
}
.cm-tabcolor-header {
font-weight: bolder;
color: var(--joplin-color) !important;
}
.cm-tabcolor-col1, .cm-tabcolor-col7 {
background-color: transparent !important;
color: #00A3A3 !important;
}
.cm-tabcolor-col2, .cm-tabcolor-col8 {
background-color: transparent !important;
color: #F459F4 !important;
}
.cm-tabcolor-col3, .cm-tabcolor-col9 {
background-color: transparent !important;
color: #23CD60 !important;
}
.cm-tabcolor-col4, .cm-tabcolor-col10 {
background-color: transparent !important;
color: red !important;
}
.cm-tabcolor-col5, .cm-tabcolor-col11 {
background-color: transparent !important;
color: #cf7506 !important;
}
.cm-tabcolor-col6, .cm-tabcolor-col12 {
background-color: transparent !important;
color: #3a79f7 !important;
}
/* userstyle.css */
/* // MARK: General */
:root {
--white: #e9edf0;
--light-grey: #b1bcc2;
--grey: #3D444E;
--dark-grey: #222222;
--black: #050017;
--red-light: #fad3d4;
--red: #f65354;
--red-dark: #FF1744;
--green-light: #c5e5b4;
--green: #58D68D;
--green-dark: #23CD60;
--yellow-light: #faf3d3;
--yellow: #E7AE1D;
--yellow-dark: #E7AE1D;
--blue-light: #bed3fc;
--blue: #02A4F1;
--blue-dark: #3a79f7;
--purple-light: #C792EA;
--purple: #F459F4;
--purple-dark: #F459F4;
--aqua-light: #70ecec;
--aqua: #1fdfdf;
--aqua-dark: #00A3A3;
--aqua-darker: #007c7c;
--orange-light: #faf3d3;
--orange: #cf7506;
--orange-dark: #E7AE1D;
}
body {
background-color: var(--dark-grey);
/* padding-top: 4px;
padding-bottom: 20px; */
font-family: "Roboto", Avenir, Arial, sans-serif !important;
}
/* #rendered-md {
max-width: 750px !important;
} */
mark {
background: var(--aqua);
color: var(--black);
padding: 2px 4px;
}
strike, s {
opacity: 0.5 !important;
}
blockquote {
color: var(--white) !important;
margin: 1.5em;
padding: 1em;
border-radius: 8px;
border-left: 6px solid var(--aqua-dark);
background-color: var(--grey);
}
strong, em {
color: var(--aqua-light) !important;
}
blockquote strong {
font-style: bold !important;
color: var(--aqua-dark) !important;
}
blockquote em {
font-style: italic !important;
color: var(--aqua-dark) !important;
}
hr {
border: none;
border-bottom: 1px solid var(--grey) !important;
margin: 2.5em 0 !important;
}
img {
border: none;
}
a {
color: var(--green-dark);
opacity: 1;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
.resource-icon {
background-color: var(--green) !important;
width: 0.9em;
height: 1.1em;
top: 0.2em;
}
a[href='#'] {
color: var(--green-dark);
}
/* // MARK: Headers */
h1 {
color: var(--white);
background: var(--grey);
text-align: center;
padding: 20px 20px 15px 20px;
border-bottom: var(--aqua-dark) 2px solid;
margin-bottom: 20px;
margin-top: 40px;
}
#rendered-md > h1:first-child {
margin-top: 5px;
padding-top: 20px;
}
h2 {
color: var(--aqua-dark);
margin-top: 40px;
}
h3 {
color: var(--aqua-dark);
}
h4, h5, h6 {
color: var(--white);
}
/* // MARK: Listen */
ol {
margin: 0 0 1.5em;
padding: 0;
counter-reset: item;
}
ol li {
margin: 0;
padding: 0 0 0 1.5em;
list-style-type: none;
counter-increment: item;
}
ol li:before {
color: var(--aqua-darker);
content: counter(item) ".";
display: inline-block;
float: left;
font-weight: bold;
padding-right: 0.5em;
width: 1em;
}
ul {
margin: 0 0 1.5em;
padding: 0;
list-style: none;
}
ul li {
margin: 0;
padding: 0 0 0 1.5em;
list-style-type: none;
}
ul li::before {
color: var(--aqua-darker);
content: "\2022";
display: inline-block;
float: left;
font-weight: bold;
padding-right: 0.3em;
width: 1em;
}
/* // MARK: Notifications */
b-construction, b-error, b-success, b-notice, b-warning, b-help {
display: block;
margin-bottom: 10px;
padding: 10px 10px 10px 50px;
border: 1px solid;
border-left: 5px solid;
border-radius: 2px;
word-wrap: break-word;
text-align: left;
box-shadow: 3px 3px 7px 0 rgba(0,0,0,0.3);
color: var(--grey);
background-color: transparent;
}
b-construction::before,
b-error::before,
b-success::before,
b-notice::before,
b-warning::before,
b-help::before {
font-weight: 700;
font-size: 1.5em;
left: 30px;
position: absolute;
}
b-construction {
border-color: var(--orange);
color: var(--orange);
}
b-construction::before {
content: "\f7d9";
font-family: "Font Awesome 5 Free" !important;
color: var(--orange-light);
}
b-error {
border-color: var(--red);
color: var(--red);
}
b-error::before {
content: "\f071";
font-family: "Font Awesome 5 Free" !important;
color: var(--red-light);
}
b-success {
border-color: var(--green-dark);
color: var(--green-dark);
}
b-success::before {
content: "\f058";
font-family: "Font Awesome 5 Free" !important;
color: var(--green-light);
}
b-warning {
border-color: var(--yellow);
color: var(--yellow);
}
b-warning::before {
content: "\f06a";
font-family: "Font Awesome 5 Free" !important;
color: var(--orange-light);
}
b-notice {
border-color: var(--aqua-darker);
color: var(--aqua-darker);
}
b-notice::before {
content: "\f05a";
font-family: "Font Awesome 5 Free" !important;
color: var(--aqua-light);
}
b-help {
border-color: var(--blue-dark);
color: var(--blue-dark);
}
b-help::before {
content: "\f059";
font-family: "Font Awesome 5 Free" !important;
color: var(--blue-light);
}
/* // MARK: Tables */
table {
border-collapse: collapse;
overflow: hidden;
}
th,
td {
padding: 15px;
background-color: rgba(255, 255, 255, 0.2);
color: #fff;
}
th {
text-align: left;
}
thead th, .jop-tinymce table th, table th {
background-color: var(--aqua-dark);
}
tbody tr:hover {
background-color: rgba(255, 255, 255, 0.3);
}
tbody td {
position: relative;
}
tbody td:hover:before {
content: "";
position: absolute;
left: 0;
right: 0;
top: -9999px;
bottom: -9999px;
background-color: rgba(255, 255, 255, 0.2);
z-index: -1;
}
table tr td > ul:last-of-type {
margin-bottom: 0em;
}
/* // MARK: Checkboxes */
input[type='checkbox'],
.md-checkbox .checkbox-label-unchecked,
.md-checkbox .checkbox-label-checked,
li.md-checkbox {
cursor: pointer !important;
}
li.md-checkbox [type="checkbox"]:not(:checked),
li.md-checkbox [type="checkbox"]:checked {
position: absolute;
left: -9999px;
}
li.md-checkbox [type="checkbox"]:not(:checked) + label,
li.md-checkbox [type="checkbox"]:checked + label {
position: relative;
padding-left: 1.5em;
cursor: pointer;
}
li.md-checkbox [type="checkbox"]:not(:checked) + label:before,
li.md-checkbox [type="checkbox"]:checked + label:before {
content: '';
position: absolute;
left: 0;
top: 0;
width: 1em;
height: 1em;
border: 1px solid var(--dark-grey);
background: var(--light-grey);
border-radius: 50%;
}
li.md-checkbox [type="checkbox"]:checked + label {
opacity: .5 !important;
color: var(--white);
}
li.md-checkbox [type="checkbox"]:checked + label:before {
background: var(--aqua-darker);
opacity: 1 !important;
}
li.md-checkbox [type="checkbox"]:not(:checked) + label:after,
li.md-checkbox [type="checkbox"]:checked + label:after {
content: '\2713\0020';
position: absolute;
top: -1px;
left: 3px;
color: var(--dark-grey);
font-weight: bold;
font-family: 'Lucida Sans Unicode', 'Arial Unicode MS', Arial;
opacity: 1 !important;
}
li.md-checkbox [type="checkbox"]:not(:checked) + label:after {
opacity: 0;
transform: scale(0);
}
li.md-checkbox [type="checkbox"]:checked + label:after {
opacity: 1;
transform: scale(1);
}
ul li[class*='checkbox']::before {
display: none;
}
/* GALLERY */
img.gallery {
border: 1px solid #00A3A3;
margin-right: 10px;
}
img.gallery:hover {
position: absolute;
width: 100%;
left: 0;
cursor: pointer;
z-index: 999;
}
/* MARK: Copy Anchor (Headers) */
h1 span.copy-anchor-icon, h2 span.copy-anchor-icon, h3 span.copy-anchor-icon {
visibility: hidden;
}
h1:hover span.copy-anchor-icon, h2:hover span.copy-anchor-icon, h3:hover span.copy-anchor-icon {
visibility: visible;
}
For this extra Bullet Journal style, have a look at my Github Project.