Why white wine can be made from red grapes

Quick answer

White wine can be made from red-skinned grapes because the juice inside many dark grapes is pale. The colour is mainly in the skins, rather than the flesh and juice.

For a white-style wine, the grapes are generally pressed and the juice is separated from the skins before fermentation, or after only brief contact. This limits the amount of skin pigment that enters the wine. For red wine, the juice usually ferments or macerates with the skins for longer, extracting more colour, tannin and other phenolic compounds.

So a wine’s colour does not tell you everything about the colour of the grapes used. The important question is: how long did the juice remain in contact with the skins?

Skin colour is not the same as juice colour

Think of a dark-skinned grape as a pale berry wrapped in coloured packaging. The skin may be red, purple or blue, while the flesh and juice inside remain light.

Pinot Noir and Meunier are well-known examples. Both have dark skins but pale flesh and juice. If their grapes are pressed carefully and the juice is kept away from the skins, the resulting wine can be pale.

This is a general principle, not an absolute rule. Not every red grape has colourless juice. Some varieties have more colour in their flesh, and grapes vary in pigment concentration and condition.

Where does the red colour come from?

Much of the red, purple and blue colour associated with grapes and young red wine comes from compounds called anthocyanins. These pigments are concentrated mainly in grape skins.

Crushing a grape does not automatically make a red wine. It simply gives the juice an opportunity to come into contact with the skin. The longer and more actively that contact continues, the more colour and other compounds may be extracted.

This is why skin contact affects more than appearance. It can also add tannin, flavour, texture and body. Tannin is the compound that can create a drying or grippy sensation in your mouth.

For a broader explanation, see Wine colour explained and What are tannins?.

How pressing keeps a wine pale

In white-style winemaking, grapes are generally pressed and the juice is separated from the skins and other solids before fermentation. This is the usual approach whether the grapes are light-skinned or dark-skinned.

With dark grapes, quick separation is especially important when the aim is a pale wine. Limited skin contact means less anthocyanin extraction. Gentle handling can also limit the extraction of tannin and other phenolic compounds.

Pressing does not create a guaranteed colour result. Pressure, contact time, grape variety, fruit condition and the winemaker’s choices all matter. Harder or longer pressing can extract more material from the skins and other solid parts of the grape.

You can learn more about this step in Pressing wine grapes.

Why red wine is usually darker

Red wine generally follows a different path. The crushed grapes, juice and skins remain together during fermentation or maceration. This gives the juice time to extract colour and tannin from the skins.

Winemakers can adjust the result through choices such as contact time, temperature and how the fruit is handled. Longer or warmer contact can increase extraction, although more extraction is not automatically better. The desired style and the condition of the fruit determine what is useful.

Some red-wine processes continue skin contact after fermentation. In Australian winemaking, this is often discussed as extended maceration. The goal may include extracting additional colour, flavour and tannin, but excessive extraction can make a wine feel harsh or overly astringent.

For the wider production sequence, see How wine is made and What is fermentation?.

What determines the final shade?

The final colour is shaped by several factors:

• Grape variety: varieties differ in skin thickness, pigment concentration and juice colour.
• Ripeness and fruit condition: these can affect the compounds available for extraction.
• Skin-contact time: more contact generally allows more skin-derived colour into the wine.
• Pressing: pressure and timing influence how much material is extracted.
• Temperature: warmer or longer contact can change extraction.
• Oxygen exposure: oxygen and later chemical reactions can alter wine colour over time.
• Winemaking choices: fermentation, clarification and other cellar decisions also contribute.

Anthocyanins are important, but they are not the entire story. Wine colour can change as pigments react with other compounds during winemaking and ageing.

Pale wine from red grapes versus rosé

A pale wine made from red grapes is not necessarily rosé.

A typical white-style wine from dark-skinned grapes aims to limit skin contact, often by pressing and separating the juice promptly. Rosé generally involves more deliberate, limited extraction of colour from red grapes. It may be made using short skin contact, direct pressing or a process called saignée, in which some juice is drained from red grapes during production.

A simple comparison:

These are typical patterns, not rigid rules. Some white wines receive skin contact, and some rosés are made by direct pressing with very little extraction.

What does “Blanc de Noirs” mean?

Blanc de Noirs means “white from black” and is an established Champagne term for Champagne made exclusively from dark-skinned grapes, especially Pinot Noir and Meunier.

It is a useful example of the principle that dark grapes can produce pale wine. However, it should not be treated as a universal name for every white wine made from red grapes, or as a guarantee of Australian labelling practice.

The takeaway

Red-skinned grapes can produce white or pale wine because their juice may be pale and most of the familiar red colour is held in the skins. Pressing and separating the juice quickly limits the extraction of those pigments. Keeping the juice with the skins for longer extracts more colour, tannin and texture, producing a red-style wine.

When you see a pale wine, do not assume the grapes had pale skins. The finished colour reflects a partnership between the grape and the way it was made.

Common questions

Is white wine always made from white grapes?

No. White wine is generally made from light-skinned grapes, but dark-skinned grapes with pale juice can also be used when skin contact is limited.

Do all red grapes have clear juice?

No. Many dark-skinned grapes have pale flesh and juice, but some varieties contain more colour internally. “All red grapes have clear juice” is too broad.

Is white wine made from red grapes the same as rosé?

Not usually. White-style production generally limits skin contact, while rosé normally involves deliberate but limited colour extraction from red grapes.

Does longer skin contact always make a better wine?

No. Longer contact can extract more colour, flavour and tannin, but excessive extraction can make a wine feel harsh or astringent. The appropriate amount depends on the fruit and intended style.