The core colors.

• vermellred (masc.; fem. 'vermella')
• blaublue (masc.; fem. 'blava')
• verdgreen (masc.; fem. 'verda')
• grocyellow (masc.; fem. 'groga')
• taronjaorange (invariable; same as the fruit)
• rosapink (invariable)
• lilapurple / lilac (invariable)
• marróbrown (invariable in gender)
• negreblack (masc.; fem. 'negra')
• blancwhite (masc.; fem. 'blanca')
• grisgrey (masc.; fem. 'grisa')
• colorcolor (the noun; 'de quin color?' = 'what color?')