Function initColourMap

src/OpenLoco/src/Graphics/Colour.cpp:206–233

    };

    void initColourMap()
    {
        // TODO: create a list of tuples with colour and image id

        for (uint32_t i = 0; i < 31; i++)
        {
            const auto c = static_cast<Colour>(i);
            auto paletteMap = Gfx::PaletteMap::getForColour(toExt(c));
            if (!paletteMap)
            {
                continue;
            }
            auto& map = *paletteMap;
            _colourMapA[i][0] = map[PaletteIndex::primaryRemap2];

            _colourMapA[i][1] = map[PaletteIndex::primaryRemap3];
            _colourMapA[i][2] = map[PaletteIndex::primaryRemap4];
            _colourMapA[i][3] = map[PaletteIndex::primaryRemap5];

            _colourMapA[i][4] = map[PaletteIndex::primaryRemap6];
            _colourMapA[i][5] = map[PaletteIndex::primaryRemap7];
            _colourMapA[i][6] = map[PaletteIndex::primaryRemap8];
            _colourMapA[i][7] = map[PaletteIndex::primaryRemap9];

            _colourMapB[i][0] = map[PaletteIndex::primaryRemapA];
            _colourMapB[i][1] = map[PaletteIndex::primaryRemapB];
        }
    }

    uint8_t getShade(Colour colour, uint8_t shade)
    {