This is the result from my system:

$ file ~/.config/libreoffice/4/cache/breeze_dark_svg/200/res/*.png
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/mainapp_48_8.png:                 PNG image data, 98 x 98, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/minus.png:                        PNG image data, 24 x 24, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odb_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odf_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odg_16_8.png:                     PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odg_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odp_16_8.png:                     PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odp_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odp_48_8.png:                     PNG image data, 98 x 98, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/ods_16_8.png:                     PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/ods_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/ods_48_8.png:                     PNG image data, 98 x 98, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odt_16_8.png:                     PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odt_32_8.png:                     PNG image data, 66 x 66, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/odt_48_8.png:                     PNG image data, 98 x 98, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/plus.png:                         PNG image data, 24 x 24, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/recentdoc_remove_highlighted.png: PNG image data, 50 x 50, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/recentdoc_remove.png:             PNG image data, 50 x 50, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/reload.png:                       PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03123.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03139.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03150.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03162.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03245.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03246.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03247.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03248.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03249.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03250.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03251.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced
/home/hossein/.config/libreoffice/4/cache/breeze_dark_svg/200/res/sx03255.png:                      PNG image data, 34 x 34, 8-bit/color RGBA, non-interlaced