Grab the assets from https://github.com/EleazarCrusader/nexus-theme, add to your sublime theme, and ammend the paths accordingly to add tab colour coding

gistfile1.json

    {
        //  - Tab close state
        "class": "tab_control",
        "settings": ["show_tab_close_buttons"],
        "content_margin": [20, 0, 20, 7]
    },
    {
        //  - Hover tab state
        "class": "tab_control",
        "attributes": ["hover"],
        "layer2.opacity": 1.0
    },
    {
        //  - Active tab state
        "class": "tab_control",
        "attributes": ["selected"],
        "layer0.opacity": 0.0,
        "layer1.opacity": 1.0,
        "layer2.opacity": 0.0
    },
    {
        //  - Modified tab state
        "class": "tab_control",
        //"settings": ["highlight_modified_tabs"],
        "attributes": ["dirty"],
        "layer0.texture": "Theme - Void/assets/tab-inactive-modified.png",
        "layer1.texture": "Theme - Void/assets/tab-active-modified.png",
        "layer2.texture": "Theme - Void/assets/tab-hover-dirty.png"
    },
    //  - Inactive tab label
    {
        "class": "tab_label",
        "fg": [180, 180, 180],
        "shadow_color": [0, 0, 0, 200],
        "shadow_offset": [0, 1]
    },

    //  - Active tab label
    {
        "class": "tab_label",
        "parents": [{"class": "tab_control", "attributes": ["selected"]}],
        "shadow_color": [0, 0, 0, 165],
        "shadow_offset": [0, 1],
        "fg": [240, 240, 240, 255]
    },

    //  - Hover tab label
    {
        "class": "tab_label",
        "parents": [{"class": "tab_control", "attributes": ["hover"]}],
        "shadow_color": [0, 0, 0, 165],
        "shadow_offset": [0, 1],
        "fg": [100, 240, 240, 255]
    },

    //  - Dirty Hover tab label
    {
        "class": "tab_label",
        "parents": [{"class": "tab_control", "attributes": ["hover", "dirty"]}],
        "shadow_color": [0, 0, 0, 165],
        "shadow_offset": [0, 1],
        "fg": [206, 84, 2, 255]
    },

    // - Dirty inactive tab label
    {
        "class": "tab_label",
        "parents": [{"class": "tab_control", "attributes": ["dirty"]}],
        "settings": ["highlight_modified_tabs"]
    },

    // - Dirty active tab label
    {
        "class": "tab_label",
        "parents": [{"class": "tab_control", "attributes": ["selected", "dirty"]}],
        "settings": ["highlight_modified_tabs"]
    },
    {
        "class": "tabset_control",
        "layer0.texture": "Theme - Void/assets/tabset-bg.png",
        "layer0.inner_margin": [2, 6],
        "layer0.opacity": 1.0,
        "content_margin": [-13, 0, -13,-6], // left, top, right, bottom
        "tab_overlap": 25,
        "tab_width": 150,
        "tab_min_width": 40,
        "tab_height": 32,
        "mouse_wheel_switch": false
    },
    {
        "class": "tabset_control",
        "settings": ["mouse_wheel_switches_tabs"],
        "mouse_wheel_switch": true
    },
    {
        "class": "tree_row",
        "layer0.texture": "Theme - Void/assets/row-active.png",
        "layer0.opacity": 0.0,
        "layer0.inner_margin": [8, 3],
        "layer1.opacity": 0.0,
        "layer1.inner_margin": [8, 3]
    },
    //  - Sidebar row selected
    {
        "class": "tree_row",
        "attributes": ["selected"],
        "layer0.opacity": 1.0
    },
    // - Sidebar row dirty
    {
        "class": "tree_row",
        "attributes": ["dirty"],
        "layer0.texture": "Theme - Void/assets/row-inactive-modified.png",
        "layer0.opacity": 0.5
    },
    // - Sidebar row selected dirty
    {
        "class": "tree_row",
        "attributes": ["selected", "dirty"],
        "layer0.texture": "Theme - Void/assets/row-active-modified.png",
        "layer0.opacity": 1.0
    }