PLSQL中方法如下
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1.在菜单按钮栏点‘定制’(点菜单'编辑/plSQL美化器选项')
2选择'用户界面'
3在'语法高亮中' 修改'字符串' 选项对应颜色
1、打开PL/SQLDeveloper软件；
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2、接下来在上方工具栏，依次点击“工具”、“首选项”；
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3、接下来出现“首选项”弹框，可以看到左侧有很多功能选项；
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4、接下来在“用户界面”，选择“字体”选项；
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5、接下来弹出字体弹框，设置“字体”、“大小”、“字形”、“颜色”；
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6、设置好属性后，点击“确定”；
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7、返回软件界面，可以看到字体、颜色就设置好了；
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选择菜单项"工具-首选项(P)..."，
然后在首选项窗口中左边的树型项目窗口中展开"代码编辑器"项目，并选择"PL/SQL语法颜色", 然后在右边的设置窗口中设置"背景"的颜色，
选择好需要的背景色之后，按"确定"按钮使背景色生效即可。