Green

Green is sacred in Islam because it was born in the desert.

It's not an arbitrary association: in an arid landscape, green is water, life, and survival. The Arabic word for paradise, Jannah, literally means "garden."

It's the same mechanism as in the other entries here: the symbolism doesn't come from an abstract idea about the color — it comes from what that color materially meant to the people who lived there.

paradise, life, revelation

The grounding is in the Quranic text itself and its classical exegesis. The prophetic tradition adds another layer: several hadith describe Muhammad wearing green garments, and he is said to have been covered with a Hibra Burd, a green garment, at his death.

It's the most common color in mosques; the Green Dome of the Prophet's Mosque in Medina was added in 1818, under the Ottoman Sultan Mahmud II (source: Petersen, Dictionary of Islamic Architecture). It appears on Quran bindings and on the flags of Saudi Arabia and Pakistan. In the Ottoman Empire, descendants of Muhammad could wear a green turban. It's also associated with al-Khidr, "the Green One," linked to immortality and verdant landscapes — an interpretive reading, not established doctrine.

• The people of paradise wear "green garments of fine silk and brocade" (Quran 18:31).
• "Upon them will be green garments of fine silk and heavy brocade, and they will be adorned with bracelets of silver" (Quran 76:21).
• In 55:76 the original term is "rafraf khudr"; the reading of "green cushions" is an exegetical interpretation, not a literal translation — al-Tabataba'i interprets it as seats covered in soft green silk.
• In 55:64, the two gardens of paradise are described as "mudhammatan" — a term al-Tabataba'i interprets as "deep green," so dark and rich it nearly verges on black. (Source: al-Tabataba'i, Al-Mizan.)
• A symbolic argument found in Islamic sources: green sits at the center of the visible spectrum, between yellow and blue — and Islam describes itself as the "middle way," a wasat (balanced) community. Symbolically: yellow as the sun (the celestial), blue as the earth (the blue planet, 70% water), and the human being — like green — a mixture of both.

nature, money, permission, ecology — overlapping layers, all fairly recent

Nature and growth is the oldest, most widely shared reading. "Money" is very U.S.-specific, tied to the color of the dollar bill. "Go"/permission comes from the traffic-light convention, a 20th-century industrial standard, not a deep cultural symbolism. And "ecology" is a 20th-century appropriation that now dominates corporate use of the color.

health and harmony

Green is associated with health and harmony.