Darker sublime text sidebar background

Default.sublime-theme

[
    {
        "class": "sidebar_container",
        "layer0.tint": [51, 51, 51],
        "layer0.opacity": 1.0,
        "layer0.draw_center": false,
        "layer0.inner_margin": [0, 0, 1, 0],
        "content_margin": [0, 0, 1, 0]
    },
    {
        "class": "sidebar_tree",
        "row_padding": [8, 3],
        "indent": 12,
        "indent_offset": 17,
        "indent_top_level": false,
        "layer0.tint": [51, 51, 51],
        "layer0.opacity": 1.0,
        "dark_content": false
    },
    {
        "class": "sidebar_heading",
        "color": [130, 130, 130],
        "font.bold": true,
        "shadow_color": [130, 130, 130],
        "shadow_offset": [0, 0]
    },
    {
        "class": "sidebar_heading",
        "parents":
        [
            { "class": "tree_row", "attributes": ["selected"] }
        ],
        "shadow_color": [160, 174, 192]
    },
    {
        "class": "sidebar_label",
        "color": [255, 255, 255]
        // , "shadow_color": [250, 250, 250], "shadow_offset": [0, 0]
    },
    {
        "class": "sidebar_label",
        "parents": [{"class": "tree_row", "attributes": ["selected"]}],
        "color": [255, 255, 255]
        // , "shadow_color": [60, 60, 60], "shadow_offset": [0, 1]
    }
]