Element UI组件在非活性时（Disabled)，字体颜色太淡，显示不清楚，加上以下样式，就可以改变字体颜色了。
.el-checkbox__input.is-disabled + .el-checkbox__label {color: #606266 !important;}.el-checkbox__input.is-disabled.is-checked + .el-checkbox__label {color: #606266 !important;}.el-checkbox__input.is-disabled.is-checked .el-checkbox__inner:after {border-color: #606266 !important;}.el-radio__input.is-disabled + span.el-radio__label {color: #606266 !important;}.el-radio__input.is-disabled.is-checked .el-radio__inner::after {background-color: #606266 !important;}.el-radio__input.is-disabled .el-radio__inner, .el-radio__input.is-disabled.is-checked .el-radio__inner {border-color: #606266 !important;}.el-input.is-disabled .el-input__inner, textarea:disabled {color: #606266 !important;}.el-range-editor.is-disabled input {color: #606266 !important;}
