Devtools Color: Animate drag rearrangement of custom color palette

Source/devtools/front_end/elements/spectrum.css

 /* https://github.com/bgrins/spectrum */
 :host {
     width: 232px;
     height: 240px;
     -webkit-user-select: none;
 }
 
 :host(.palettes-enabled) {
     height: 271px;
 }
@@ skipping 192 matching lines @@
     border-radius: 2px;
     margin: 6px;
     cursor: pointer;
 }
 
 .spectrum-palette > .spectrum-palette-color {
     transition: transform 100ms cubic-bezier(0, 0, 0.2, 1);
     border: 1px solid rgba(0, 0, 0, 0.1);
 }
 
-.spectrum-palette > .spectrum-palette-color.empty-color {
-    border-color: transparent;
+.empty-color {
+    border: 1px solid #ddd;

[samli, 2015/08/26 22:08:37]

This is used in the color palette preview (switcher UI), removed from the main
palette window.

 }
 
-.spectrum-palette > .spectrum-palette-color:not(.empty-color):hover {
+.spectrum-palette > .spectrum-palette-color:hover {
     transform: scale(1.15);
 }
 
 .add-color-toolbar {
     position: absolute;
     right: 29px;
     bottom: 5px;
 }
 
 .spectrum-palette-switcher {
@@ skipping 76 matching lines @@
     width: 100%;
     height: 100%;
 }
 
 .spectrum-contrast-line {
     fill: none;
     stroke: white;
     opacity: 0.7;
     stroke-width: 1.5px;
 }