Opera has 9 color schemes by default and you can change it from Tools → Appearance... → Skin → Color scheme. Following will add 140 (including 6 duplicates) color schemes.
Download dialog-modified.ini (file contains all dialog tweaks), enter path to dialog-modified.ini in Dialog Configuration, save and restart Opera.
[or]
Make a copy of defaults\dialog.ini from Opera installation directory, rename it to dialog-modified.ini and open it in any text editor. Under [Customize Toolbar Dialog], replace line starting with Dropdown, 0, Skin_color_scheme_dropdown with the following and save.
Dropdown, 0, Skin_color_scheme_dropdown, 100, 290, 150, 23, Move down = Disable skin coloring,,,D_COLOR_SCHEME_NO_COLOR_S | Use system skin coloring,,,D_COLOR_SCHEME_SYSTEM_COLOR_S | Set skin coloring, #583F28,,D_COLOR_SCHEME_GOLD | Set skin coloring, #9A8454,,D_COLOR_SCHEME_SAND | Set skin coloring, #479B65,,D_COLOR_SCHEME_JUNGLE | Set skin coloring, #4E7A94,,D_COLOR_SCHEME_SEA | Set skin coloring, #283358,,D_COLOR_SCHEME_BLUE | Set skin coloring, #606090,,D_COLOR_SCHEME_INDIGO | Set skin coloring, #43354D,,D_COLOR_SCHEME_PURPLE | Set skin coloring, #BE324C,,D_COLOR_SCHEME_CRIMSON | Set skin coloring, #801010,,D_COLOR_SCHEME_RED | | Set skin coloring, #F0F8FF,,Alice Blue | Set skin coloring, #FAEBD7,,Antique White | Set skin coloring, #00FFFF,,Aqua | Set skin coloring, #7FFFD4,,Aquamarine | Set skin coloring, #333366,,Atlas Blue | Set skin coloring, #F0FFFF,,Azure | Set skin coloring, #F5F5DC,,Beige | Set skin coloring, #FFE4C4,,Bisque | Set skin coloring, #000000,,Black | Set skin coloring, #FFEBCD,,Blanched Almond | Set skin coloring, #0000FF,,Blue. | Set skin coloring, #8A2BE2,,Blue Violet | Set skin coloring, #A52A2A,,Brown | Set skin coloring, #DEB887,,Burly Wood | Set skin coloring, #5F9EA0,,Cadet Blue | Set skin coloring, #7FFF00,,Chartreuse | Set skin coloring, #D2691E,,Chocolate | Set skin coloring, #FF7F50,,Coral | Set skin coloring, #6495ED,,Cornflower Blue | Set skin coloring, #FFF8DC,,Cornsilk | Set skin coloring, #DC143C,,Crimson. | Set skin coloring, #00008B,,Dark Blue | Set skin coloring, #008B8B,,Dark Cyan | Set skin coloring, #B8860B,,Dark Golden Rod | Set skin coloring, #A9A9A9,,Dark Grey | Set skin coloring, #006400,,Dark Green | Set skin coloring, #BDB76B,,Dark Khaki | Set skin coloring, #8B008B,,Dark Magenta | Set skin coloring, #556B2F,,Dark Olive Green | Set skin coloring, #FF8C00,,Dark Orange | Set skin coloring, #9932CC,,Dark Orchid | Set skin coloring, #8B0000,,Dark Red | Set skin coloring, #E9967A,,Dark Salmon | Set skin coloring, #8FBC8F,,Dark Sea Green | Set skin coloring, #483D8B,,Dark Slate Blue | Set skin coloring, #2F4F4F,,Dark Slate Grey | Set skin coloring, #00CED1,,Dark Turquoise | Set skin coloring, #9400D3,,Dark Violet | Set skin coloring, #FF1493,,Deep Pink | Set skin coloring, #00BFFF,,Deep Sky Blue | Set skin coloring, #696969,,Dim Grey | Set skin coloring, #1E90FF,,Dodger Blue | Set skin coloring, #B22222,,Fire Brick | Set skin coloring, #FFFAF0,,Floral White | Set skin coloring, #228B22,,Forest Green | Set skin coloring, #FF00FF,,Fuchsia | Set skin coloring, #DCDCDC,,Gainsboro | Set skin coloring, #F8F8FF,,Ghost White | Set skin coloring, #FFD700,,Gold. | Set skin coloring, #DAA520,,Golden Rod | Set skin coloring, #808080,,Grey | Set skin coloring, #008000,,Green | Set skin coloring, #ADFF2F,,Green Yellow | Set skin coloring, #F0FFF0,,Honey Dew | Set skin coloring, #FF69B4,,Hot Pink | Set skin coloring, #CD5C5C,,Indian Red | Set skin coloring, #4B0082,,Indigo. | Set skin coloring, #FFFFF0,,Ivory | Set skin coloring, #F0E68C,,Khaki | Set skin coloring, #E6E6FA,,Lavender | Set skin coloring, #FFF0F5,,Lavender Blush | Set skin coloring, #7CFC00,,Lawn Green | Set skin coloring, #FFFACD,,Lemon Chiffon | Set skin coloring, #ADD8E6,,Light Blue | Set skin coloring, #F08080,,Light Coral | Set skin coloring, #E0FFFF,,Light Cyan | Set skin coloring, #FAFAD2,,Light Golden Rod Yellow | Set skin coloring, #D3D3D3,,Light Grey | Set skin coloring, #90EE90,,Light Green | Set skin coloring, #FFB6C1,,Light Pink | Set skin coloring, #FFA07A,,Light Salmon | Set skin coloring, #20B2AA,,Light Sea Green | Set skin coloring, #87CEFA,,Light Sky Blue | Set skin coloring, #778899,,Light Slate Grey | Set skin coloring, #B0C4DE,,Light Steel Blue | Set skin coloring, #FFFFE0,,Light Yellow | Set skin coloring, #00FF00,,Lime | Set skin coloring, #32CD32,,Lime Green | Set skin coloring, #FAF0E6,,Linen | Set skin coloring, #FF00FF,,Magenta | Set skin coloring, #800000,,Maroon | Set skin coloring, #66CDAA,,Medium Aqua Marine | Set skin coloring, #0000CD,,Medium Blue | Set skin coloring, #BA55D3,,Medium Orchid | Set skin coloring, #9370D8,,Medium Purple | Set skin coloring, #3CB371,,Medium Sea Green | Set skin coloring, #7B68EE,,Medium Slate Blue | Set skin coloring, #00FA9A,,Medium Spring Green | Set skin coloring, #48D1CC,,Medium Turquoise | Set skin coloring, #C71585,,Medium Violet Red | Set skin coloring, #191970,,Midnight Blue | Set skin coloring, #F5FFFA,,Mint Cream | Set skin coloring, #FFE4E1,,Misty Rose | Set skin coloring, #FFE4B5,,Moccasin | Set skin coloring, #FFDEAD,,Navajo White | Set skin coloring, #000080,,Navy | Set skin coloring, #FDF5E6,,Old Lace | Set skin coloring, #808000,,Olive | Set skin coloring, #688E23,,Olive Drab | Set skin coloring, #FFA500,,Orange | Set skin coloring, #FF4500,,Orange Red | Set skin coloring, #DA70D6,,Orchid | Set skin coloring, #EEE8AA,,Pale Golden Rod | Set skin coloring, #98FB98,,Pale Green | Set skin coloring, #AFEEEE,,Pale Turquoise | Set skin coloring, #D87093,,Pale Violet Red | Set skin coloring, #FFEFD5,,Papaya Whip | Set skin coloring, #FFDAB9,,Peach Puff | Set skin coloring, #CD853F,,Peru | Set skin coloring, #FFC0CB,,Pink | Set skin coloring, #DDA0DD,,Plum | Set skin coloring, #B0E0E6,,Powder Blue | Set skin coloring, #800080,,Purple. | Set skin coloring, #FF0000,,Red. | Set skin coloring, #BC8F8F,,Rosy Brown | Set skin coloring, #4169E1,,Royal Blue | Set skin coloring, #8B4513,,Saddle Brown | Set skin coloring, #FA8072,,Salmon | Set skin coloring, #F4A460,,Sandy Brown | Set skin coloring, #2E8B57,,Sea Green | Set skin coloring, #FFF5EE,,Sea Shell | Set skin coloring, #A0522D,,Sienna | Set skin coloring, #C0C0C0,,Silver | Set skin coloring, #87CEEB,,Sky Blue | Set skin coloring, #6A5ACD,,Slate Blue | Set skin coloring, #708090,,Slate Grey | Set skin coloring, #FFFAFA,,Snow | Set skin coloring, #00FF7F,,Spring Green | Set skin coloring, #4682B4,,Steel Blue | Set skin coloring, #D2B48C,,Tan | Set skin coloring, #008080,,Teal | Set skin coloring, #D8BFD8,,Thistle | Set skin coloring, #FF6347,,Tomato | Set skin coloring, #40E0D0,,Turquoise | Set skin coloring, #EE82EE,,Violet | Set skin coloring, #F5DEB3,,Wheat | Set skin coloring, #FFFFFF,,White | Set skin coloring, #F5F5F5,,White Smoke | Set skin coloring, #FFFF00,,Yellow | Set skin coloring, #9ACD32,,Yellow Green
Enter path to
Dialog Configuration file, save and restart Opera.
More color schemes
Optional: Add HTML Named Colours & HEX Codes panel to view colors.
You have to
update dialog-modified.ini when you install major version of Opera.
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