The law of segregation says that in hetrozygotes, dominant and recessive alleles remain together without mixing into one another. In incomplete dominance, two alleles blend with each other, and the hetrozygote is a new individual with blend of both. So can it mean that incomplete dominance does not follow the law of segregation and also the law of dominance? What about law of segregation? Does it follows it?
I think you are mixing different notions, you need to be clear on what you are talking and then your answer will appear as evident to you. I invite you to check this site to get the definitions. Firstly
What is law of segregation also called first law of Mendel?
It is the hypothesis that during the formation of reproductive cells (gametes), pairs of hereditary factors (alleles of genes) for a specific trait separate so that offspring receive one allele from each parent.
Note that there is nothing here about expression (which is what is visible), it's all about genes and alleles.
What is law of dominance also called third law of Mendel?
It states that one of the allele for a pair of inherited allele will be dominant and the other recessive.
This one is about expression, you know you can have two different alleles but this law says one will always be dominant over the other (which means the allele will be expressed whether the other one will be silenced or not visible).
And what about incomplete dominance?
Well Mendel during his studies encounter more complicated case than simple dominance, sometimes the two alleles will express equally (co-dominance) giving a third observable phenotype (like blood-type AB for example). In reality, most of time the observable phenotype is nearer of one phenotype given by the domniant allele.
To conclude: incomplete dominance doesn't break the first law of mendel (segregation) as alleles will be equally transmitted to offspring but it breaks the law of dominance because the phenotype is not exactly one given by a unique allele but rather a mix between both.
Remember: Segregation law is not about expression or phenotype