reading_screen.kv

#: import gch kivy.utils.get_color_from_hex

#: set btn_color gch("b90000")
#: set text_color gch("000000")
#: set bg_color gch("ffffff")


<ReadingScreen>
    MDFloatLayout:
        MDToolbar:
            id: toolbar
            title: "Title"
            left_action_items: [["chevron-left", lambda x: root.goback()]]
            pos_hint: {'top': 1,}
            md_bg_color: btn_color
        MDLabel:
            id: doc_name
            text: "Documents"
            theme_text_color: 'Custom'
            text_color: btn_color
            pos_hint: {'center_x': 0.13, 'center_y': 0.85}
            halign: 'center'
            font_size: '16sp'
            bold: True
            font_style: 'Body1'



        ScrollView:
            do_scroll_y: True
            do_scroll_x: False
            size_hint_y: .95
            pos_hint: {'center_x': 0.5,'center_y':.35}
            bar_width: 2

            GridLayout:
                # bg_color: btn_color
                id: docs
                cols: 1
                height: self.minimum_height
                row_default_height:'55dp'
                size_hint_y: None
                padding: '15dp','10dp'
                spacing: '15dp','10dp'