Is this what you mean?
In button_card_templates.yaml
replace sliderColor: '#c7c7c7'
with sliderColoredByLight: true
Remove this whole block from themes.yaml
#popup>div.action-holder>div:last-child>div:last-child>.color {
background: radial-gradient(circle, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 80%),
conic-gradient(rgb(120, 39, 230), rgb(230, 34, 231), rgb(228, 5, 136), rgb(228, 25, 25),
rgb(229, 105, 30), rgb(232, 226, 46), rgb(125, 230, 41), rgb(52, 232, 40), rgb(51, 231, 92),
rgb(52, 232, 224), rgb(32, 125, 229), rgb(18, 39, 229), rgb(120, 39, 230));
border-width: 2px;
border-color: #e6e6e6;
--size: 4.4em !important;
}
and also add/remove actions:
in button_card_templates.yaml -> light-popup-card
God jul!