The user interface of every Carbon product consists of two layers: The common product layout/design inherited from the Carbon platform, and the styles/images unique to each product. All the common templates, styles (css files), and images are stored in the Carbon core UI bundle, which is named org.wso2.carbon.ui-<version-number>.jar (<version-number> is the particular version of the bundle). This bundle is responsible for the overall look and feel of the entire Carbon platform. In addition to this, each product has another style bundle, which has all the overriding style sheets and images: org.wso2.<product-name>.styles-<version-number>.jar.
The two UI bundles (jar files) responsible for the look and feel of TS 1.1.0 are as follows:
<PRODUCT_HOME>/repository/components/plugins/org.wso2.carbon.ui-4.2.0.jar<PRODUCT_HOME>/repository/components/plugins/org.wso2.ts.styles-1.1.0.jar.