And here is the problem, I would need to somehow access particular rectangle's color variable in order to customize it. But, as far as I know, the gridView component isn't allowing me to do such a thing. My best thought (Please, don't punch me for that) was to create unique id while creating a rectangle, and later on, apply it by using JS. And as you can predict, this approach isn't working at all (well, maybe only this applying part). So, is there a better way to do it? And if yes, how?

Here is my code for GridView:

GridView {
            id: gridView1
            flickableDirection: Flickable.VerticalFlick
            snapMode: GridView.NoSnap
            highlightRangeMode: GridView.NoHighlightRange
            highlightMoveDuration: 148
            flow: GridView.FlowLeftToRight
            layoutDirection: Qt.RightToLeft
            anchors.rightMargin: 5
            anchors.leftMargin: 5
            anchors.bottomMargin: 10
            anchors.topMargin: 10
            delegate: Item {
                height: 100
                Column {
                   ColorBlock
                   {
                     width: 100
                     height: 100
                   }
                }
            }
            model: ListModel {
              id: tEST
            }
            cellHeight: 100
            cellWidth: 100
        }

and for my rectangle :

Rectangle {
    Variables
    {
        id:vars
    }

    property string namE: vars.normalName
    property  var colorR
    id: namE
    width: 70
    height: 70
    color: colorR

    MouseArea {
        id: mouseArea1
        anchors.fill: parent

        onClicked:
        {
            console.log("test")
            console.log(namE.namE)
        }
    }
}

and variables:

Item {
     id : varialbeS
     property string baseNamne: "justTestName";
     property int numbeR: 0
     property string normalName: baseNamne + numbeR.toString();

     property string objectNamE
}

Yes, I know, it was very stupid approach, but I'm still learining.

Thanks in advance!