1px rogue white line on mobile only

Site URL: http://dragonfly-drum-g8n7.squarespace.com

hello! another question, I have this rogue white line as you can see below between sections of the same colour. In desktop it is not there, only in mobile. I have tried a negative margin but no love. Thank you! 

Add to Design > Custom CSS

@media screen and (max-width:767px) {
[data-section-id="615cff0dde2f40474698076a"] {
    background-color: #027d71;
}
}