Mercado Libre uses yellow as its main color on its website, app and ads. The logo, two hands shaking, pairs the yellow with a dark blue. It is one of the best-known brands in Latin America. The HEX codes are commonly used values, not published as an official specification.
These are commonly used reference values; they can vary by source, material or screen. Brand names and colors belong to their owners; this page only lists color codes for information.