app/themes/light/basic.less

@separator-color: #ffffff;
/** Background colors */
@bg-color-light-gray: #4d4d4d;
@bg-color-dark-gray: #242424;
@bg-color-gray: #373737;
@bg-color-advanced: #6981fe;
@bg-color-error: #fe3434;
@bg-color-mask: #ffffff;
@bg-color-highlight: #dde2ff;
/** Font colors */
@font-color-light: #ffffff;
@font-color-advanced: #6981fe;
@font-color-error: #fe3434;
@font-color-disabled: #cacaca;
/** Form colors */
@form-label-color: #bbd8fd;
@form-button-color: @bg-color-gray;
@form-button-hover-color: #6981fe;
@form-button-disabled-color: #8e8e8e;
/** Grid colors */
@grid-header-bg-color: #303030;
@grid-border-color: #414141;
@grid-header-font-color: #bbd8fd;
@grid-row-selected-color: rgba(105, 129, 254, .5);
@grid-row-hover-color: @bg-color-advanced;
/** Widget colors */
@widget-bg-color: #353535;
@widget-gallery-border-color: #676767;
@widget-gallery-add-color: @form-button-hover-color;
@widget-gallery-delete-color: @bg-color-error;

/** General styles */
.unselectable {
    cursor: default;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.visible {
    display: block;
}

.hidden {
    display: none;
}

.pull-right {
    float: right;
}

.pull-left {
    float: left;
}

.clear-floats {
    clear: both;
    display: none;
}

.font-color-light {
    color: @font-color-light;
}

.font-color-advanced {
    color: @font-color-advanced;
}

.form-button-hover-color {
    background: @form-button-hover-color;
}

.btn-close {
    padding-bottom: 4px;
}
.btn-close a {
    cursor: pointer; 
    float: right;
    font-size: 19pt;
    font-weight: bold;
    text-decoration: none;
}