I went for changing the default theme
Classic:
state-alarm-armed-color: '#F44336' # Red
state-alarm-arming-color: '#FF9800' # Orange
state-alarm-disarmed-color: '#4CAF50' # Green
state-alarm-pending-color: '#FF9800' # Orange
state-alarm-triggered-color: '#F44336' # Red
state-alert-color: '#F44336' # Red
# Header:
app-header-background-color: rgb(17, 17, 17)
app-header-text-color: rgb(198, 203, 210)
app-header-selection-bar-color: var(--primary-color)
app-header-edit-background-color: rgb(136, 136, 136)
# Main Interface Colors
primary-color: rgb(138, 180, 248)
primary-background-color: rgb(17, 17, 17)
secondary-background-color: rgb(28, 28, 28)
divider-color: var(--primary-background-color)
accent-color: var(--primary-color)
# Text
primary-text-color: rgb(242, 242, 242)
secondary-text-color: rgb(166, 166, 166)
text-primary-color: var(--primary-text-color)
disabled-text-color: rgba(184, 190, 199, 0.4)
# Sidebar Menu
sidebar-icon-color: rgb(68, 115, 158)
sidebar-text-color: rgb(198, 203, 210)
sidebar-background-color: rgb(28, 28, 28)
sidebar-selected-icon-color: rgb(138, 180, 248)
sidebar-selected-text-color: var(--sidebar-selected-icon-color)
# Buttons
paper-item-icon-color: rgb(68, 115, 158)
paper-item-icon-active-color: rgb(138, 180, 248)
mdc-button-outline-color: rgb(138, 180, 248)
# States and Badges
state-icon-color: var(--paper-item-icon-color)
state-icon-active-color: var(--paper-item-icon-active-color)
state-icon-unavailable-color: var(--disabled-text-color)
# Sliders
paper-slider-knob-color: rgb(138, 180, 248)
paper-slider-knob-start-color: var(--paper-slider-knob-color)
paper-slider-pin-color: var(--paper-slider-knob-color)
paper-slider-active-color: var(--paper-slider-knob-color)
paper-slider-secondary-color: var(--light-primary-color)
# Labels
label-badge-background-color: var(--secondary-background-color)
label-badge-text-color: var(--primary-text-color)
label-badge-red: rgb(208, 101, 104)
label-badge-green: rgb(128, 200, 132)
label-badge-blue: rgb(138, 180, 248)
label-badge-yellow: rgb(223, 194, 113)
label-badge-gray: rgb(95, 98, 103)
# Cards
card-background-color: rgb(28, 28, 28)
ha-card-background: rgb(28, 28, 28)
ha-card-border-color: rgb(42, 43, 46)
paper-dialog-background-color: var(--card-background-color)
paper-listbox-background-color: var(--card-background-color)
paper-card-background-color: var(--card-background-color)
# Switches
switch-checked-button-color: rgb(138, 180, 248)
switch-checked-track-color: rgb(138, 180, 248)
switch-unchecked-button-color: rgb(172, 176, 185)
switch-unchecked-track-color: rgb(154, 160, 166)
# Toggles
paper-toggle-button-checked-button-color: var(--switch-checked-button-color)
paper-toggle-button-checked-bar-color: var(--switch-checked-track-color)
paper-toggle-button-unchecked-button-color: var(--switch-unchecked-button-color)
paper-toggle-button-unchecked-bar-color: var(--switch-unchecked-track-color)
# Table
table-row-background-color: var(--primary-background-color)
table-row-alternative-background-color: var(--secondary-background-color)
data-table-background-color: var(--primary-background-color)
# Dropdowns
material-background-color: var(--table-row-background-color)
material-secondary-background-color: var(--table-row-alternative-background-color)
mdc-theme-surface: var(--secondary-background-color)
# Pre/Code
markdown-code-background-color: rgb(17, 17, 17)
code-editor-background-color: rgb(17, 17, 17)
# Checkboxes
mdc-checkbox-unchecked-color: rgb(68, 115, 158)
mdc-checkbox-disable-color: var(--disabled-text-color)
mdc-select-fill-color: rgb(42, 43, 46)
mdc-select-ink-color: var(--primary-text-color)
mdc-select-label-ink-color: var(--secondary-text-color)
mdc-select-idle-line-color: var(--primary-text-color)
mdc-select-dropdown-icon-color: var(--secondary-text-color)
mdc-select-hover-line-color: var(--accent-color)
mdc-text-field-fill-color: var(--mdc-select-fill-color)
# Input
input-fill-color: var(--secondary-background-color)
input-dropdown-icon-color: var(--secondary-text-color)
input-ink-color: var(--primary-text-color)
input-label-ink-color: var(--secondary-text-color)
input-idle-line-color: var(--primary-text-color)
input-hover-line-color: var(--accent-color)
#RGB
rgb-primary-text-color: 68, 115, 158
rgb-primary-color: 68, 115, 158