Purpose of use
The image is used to identify the organization Indian Institute of Science, a subject of public interest. The significance of the logo is to help the reader identify the organization, assure the readers that they have reached the right article containing critical commentary about the organization, and illustrate the organization’s intended branding message in a way that words alone could not convey.
Because it is a logo there is almost certainly no free equivalent. Any substitute that is not a derivative work would fail to convey the meaning intended, would tarnish or misrepresent its image, or would fail its purpose of identification or commentary.
if you look at how the logo is in color u might get ideas