please set your setting.json. important requirements
"workbench.colorCustomizations": {
"editor.selectionBackground": "#FFFF96", //選取字色 'you can set other color'
"editor.findMatchBackground": "#FFFF96", //搜索選取字色 'you can set other color'
"editor.selectionHighlightBackground": "#00000000", //選取字改透明色 'required important'
"editor.findMatchHighlightBackground": "#00000000", //搜索選取字改透明色 'required important'
"editor.wordHighlightBackground": "#00000000", //全文相同選取字改透明色 'required important'
"editorBracketMatch.border": "#FF0000", //括號的框線色 'you can set other color'
"editorBracketMatch.background": "#0052cc" //括號的背景色 'you can set other color'
}
you can customized setting
"highlight-icemode.borderWidth": "2px", //default 1px
"highlight-icemode.borderRadius": "0px", //default 3px
"highlight-icemode.borderColor": "", //default ''
"highlight-icemode.backgroundColor": "", //default ''
always perfect
...
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Enjoy!