Hidden Input with Opacity On display error And minicolors-rgba can't get value

[JustGentle]

My Code:

<div ng-init="color={opacityHex:'',opacityVal:'0.5',opacityRgba: 'rgba(125,125,125,0.5)'}">
        <input type="hidden" class="form-control"
                    minicolors="{opacity:true}"
                    minicolors-rgba="color.opacityRgba"
                    minicolors-opacity="color.opacityVal"
                    ng-model="color.opacityHex" />
</div>

two problem:

1. when opacity < 1 the background-image width away 28px
2. minicolors-rgba minicolors-opacity doesn't work, can't init color or get current color

[JustGentle]

second problem minicolors-rgba solved #15 ,but minicolors-opacity doesn't work