 Welcome back to the session on latex. In this session, we will learn to change the colour of the theme. Till now, we have seen some colour themes having standard colours like blue, yellow and maroon. It would be a good idea to have a colour of a choice. The set beamer colour structure command is used to change the colour of the theme. Let us see a demo. I already have my previous session opened here. Please note that the dvips names is mentioned as an argument in the document class and the package colour is also included. Let us write set beamer colour structure and we write fg equal to violet. Let us build and run. Bravo! The entire colour theme is set to violet. The title background, the text, footer, frame title, blocks, bullets, everything is changed to violet. Let us try out a few more colours as well. Let us change this to brown. Let us build and run. That is it. Let us change it to green. Build and run. There you go. Now, let us change the theme to Berkeley instead of Madrid. Build and run. There you go. Observe that you can change the theme too at any point in time. Let us change the colour to violet and switch back to the Madrid theme. Build and run. So, this is how the presentation looks like. Apart from changing the colour themes, we may sometimes need to change the colour of specific components. For example, instead of the white colour of the text in the title, we may feel of using another colour or choosing some other shades in the footer. Well, all of these components have some names. For example, this is the title. In the footer area in which the author name and institute is appearing is called Palette Cherie. The area in which the title appears is called Palette Secondary. And finally, this is known as Palette Primary in which the date and slide number appears. Let us go back to our slides. As stated, we can change the colours of all these components. The commands are set beamer colour and the name of the component. BG means background colour and FG means the colour of the text. Let us see a demo. Let us copy paste this and we write Palette Palette Cherie and we say VG equal to grey and FG equal to yellow. Build and run. Observe that the footer has grey background colour and the text is yellow colour. Let us change the colour of the secondary palette as well. Let us copy paste this and instead of tertiary, we write secondary and let us mix grey and black to get a darker shade of grey. Let us write 70 black. Let us build and run. Notice that the secondary palette has a darker shade than the tertiary one. Now, let us change the primary one to black background and yellow text. So, instead of tertiary, we write primary and background, black and foreground is yellow. Build and run. Oh, this change the colour of the primary palette, but it also change the colour of the title and frame title as well. To override it, let us explicitly mention the colour of the title and frame title. So, we write set beamer colour in brackets. We write title and let us say BG is equal to violet and foreground let us have white. Build and run. That is it. We reverted the colour of the title. Same way, let us revert the colour of the frame title as well. So, instead of title, we write frame title having the same parameter colours. Let us build and run. That is it. Now, let us add a background colour to all our slides. The command is set beamer colour and instead of title, we write background canvas and let us have BG yellow. Let us mix it with white. Build and run. Notice that all the slides have yellow background colour. Let us switch back to our slides. We just saw to change the colour of the title and frame title. We also saw to change the colour of the background. So, in this session, we change the colour of the theme, some components and the background colour. Thank you. Have a nice day.