HUML is a simple, strict, serialization language for documents, datasets, and configuration.

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HUML is a new experimental markup language designed for documents, datasets, and configuration files. Created to address frustrations with YAML's indentation sensitivity and other markup languages' limitations, it prioritizes human readability, visual hierarchy comprehension, and strict formatting rules. The language aims to eliminate ambiguities by providing single, consistent ways to represent data structures while maintaining visual clarity similar to YAML but with stricter syntax to prevent common errors.

HUML :: Human-oriented Markup Language

For readability I personally prefer the hashicorp configuration language (HCL).

I love this but i think its not a good enough improvement for it to fully replace yaml and therefore i think it will just end up as being just another standard that you now have to learn as well, increasing the complexity of the field for little added value.

I prefer the equals sign instead of the colon, it makes more sense and is more readable IMO