How to replace Jenkins logo and title text

Refer below link

http://seleniumocean.blogspot.com/2018/03/replace-jenkins-logo-and-text-to-your.html

Install a plugin

https://wiki.jenkins.io/display/JENKINS/Simple+Theme+Plugin
https://plugins.jenkins.io/simple-theme-plugin

Configure

Jenkins --> Manage Jenkins --> Configure System --> Theme

CS sample

/* Custom style for Autobahn Jenkins Platform */
.logo img {
  content:url("<JENKINS_HOME>/userContent/layout/logo.jpg");
  /*change the path to your logo path*/
}

#jenkins-name-icon {
  display: none;
}


.logo:after {
content: 'Sample Project';
font-weight: bold;
font-size: 40px;
font-family:"Brush Script MT", cursive;
margin-left: 200px;
margin-right: 12px;
color: Aqua;
line-height: 40px;
}