my hair is red x
Elle a les cheveux roux Elle est rousse
j'ai les cheveux roux
This means "I have eyes and hair which are red and medium-length" its not a very grammatically correct sentence...
To say "I don't have red hair" in French, you would say "Je n'ai pas les cheveux roux."
i have ... hair
'stiff hair'
Short hair
J'ai (I have) / tu as (you have) les cheveux roux.
Les cheveux (masc.) mean the hair in French. This is the plural form of "un cheveu" (One hair).
I have wavy hair.
ginger hair is 'les cheveux roux' in French.
elle a les cheveux (colour) = she has (colour) hair