How to make a container as a arrow with css

Question

I'm trying to make like this screen below using css but id doest work : enter image description here

could you help please to achieve the result above ?

this is what I tried :

width: 201px;
    background-color: rgb(75, 209, 227);
    /* border-radius: 0px 76px 79px 0px; */
    flex-shrink: 0;
    height: 51px;
    border-top-left-radius: 0%;
    border-top-right-radius: 36%;
    border-bottom-right-radius: 38%;
    border-bottom-left-radius: 0%;

the result : enter image description here`