theme.css

/**
 * App Window
 */
@define-color bg_color #2E2E2E;
@define-color window_bg @bg_color;
@define-color window_border_color #2F2F2F;
@define-color prefs_backgroud #2E2E2E;

/**
 * Input
 */
@define-color selected_bg_color #555753;
@define-color selected_fg_color #FFFFFF;
@define-color input_color #FFFFFF;
@define-color caret_color darker(@input_color);

/**
 * Result items
 */
@define-color item_name #FFFFFF;
@define-color item_text #999;
@define-color item_box_selected #e65d27;
@define-color item_text_selected #FFFFFF;
@define-color item_name_selected #FFFFFF;
@define-color item_shortcut_color #777;
@define-color item_shortcut_shadow darker(@bg_color);
@define-color item_shortcut_color_sel #FFFFFF;
@define-color item_shortcut_shadow_sel darker(@item_box_selected);

.app {
    background-color: @window_bg;
    border-color: @window_border_color;
}

.input
{
    caret-color: @caret_color;
    color: @input_color;
    border: solid 2px #e65d27;
    border-radius: 1px;
    background-color: #404040
}

/**
 * Selected text in input
 */
.input *:selected,
.input *:focus,
*:selected:focus {
    background-color: alpha (@selected_bg_color, 0.9);
    color: @selected_fg_color;
}

.item-text {
    color: @item_text;
}
.item-name {
    color: @item_name;
}

.selected.item-box {
    background-color: @item_box_selected;
    border-left: 1px solid @window_border_color;
    border-right: 1px solid @window_border_color;
}
.selected.item-box .item-text {
    color: @item_text_selected;
}
.selected.item-box .item-name {
    color: @item_name_selected;
}
.item-shortcut {
    color: @item_shortcut_color;
    text-shadow: 1px 1px 1px @item_shortcut_shadow;
}
.selected.item-box .item-shortcut {
    color: @item_shortcut_color_sel;
    text-shadow: 1px 1px 1px @item_shortcut_shadow_sel;
}

.prefs-btn {
    opacity: 0.8;
    transition: background-color 0.5s;
}
.prefs-btn:hover {
    background-color: @prefs_backgroud;
    transition: background-color 0.5s;
}