Chromate or chromat, and their derived terms, may refer to:

• Chromate and dichromate, ions
• Monochromate, an ion
• Trichromate, an ion
• Tetrachromate, an ion
• Chromate conversion coating, a method for passivating metals

• Monochromacy (monochromate) having one color vision
• Dichromatism (dichromate) having two color vision
• Trichromacy (trichromate) having three color vision
• Trichrome staining, a staining method
• Tetrachromacy (tetrachromate) having four color vision

• Chromat, a fashion label
• Monochromatic or monochrome, images composed of one color (or values of one color)

• Chromite, a chromium-containing mineral
• Chromite (compound), chemical compounds containing the (CrO₂)⁻ anion
• Chrome (disambiguation)