The calculation
Gold is the number 1's colour because 1 belongs to the Sun, and gold has been the Sun's metal in every tradition that worked metal. It reads as confidence, visibility and rightful attention — the colour you wear when you intend to be seen.
Silver and white belong to 2 because 2 belongs to the Moon, and silver has been the Moon's metal since alchemy began. It reads as receptivity, diplomacy and reflected light — the colour of listening well rather than speaking first.
Yellow belongs to 3 through Jupiter, the classical planet of growth and good fortune. In the Vedic tradition Jupiter (Guru, the teacher) is explicitly yellow, worn on Thursdays; the colour reads as optimism, generosity and the confidence to think bigger.
Four is the odd one out: the classical seven planets never claimed it, so later traditions did. Vedic numerology gives 4 to Rahu, the smoky shadow planet; modern Western numerology gives it Uranus, the electric disruptor. Both settle on deep, electric blues and greys.
Green belongs to 5 through Mercury, the fastest planet and the patron of messages, markets and quick thinking. In the Vedic tradition Mercury (Budha) is green outright, with emerald as its gem; the colour reads as exchange, freshness and things in motion.
Pink and soft white belong to 6 through Venus, the planet of love, beauty and agreement. Vedic astrology dresses Venus (Shukra) in white and blush tones with diamond as its gem; the colour reads as warmth, care and the deliberate pleasantness that makes rooms work.
Seven, like four, sits outside the old seven-planet table, so its colour was assigned later: to sea-deep Neptune in the modern West, to smoky Ketu in India. Both traditions reach for the far end of the spectrum: violets, sea-greens, mist, the colours of things not fully visible.
Dark blue and black belong to 8 through Saturn, the slowest of the classical planets and the strictest teacher in the sky. Its day is Saturday, its metal is lead, and its colours are the deep, unhurried ones: navy, charcoal, black. The reading is discipline that compounds.
Red belongs to 9 through Mars, the red planet in the sky and the soldier in the tables. Its day is Tuesday, its metal is iron (the metal that makes blood red), and the colour reads as vitality, courage and heat applied on purpose.
Classical astrology paired each celestial body with a metal, a day and a colour, and numerology paired each body with a number, so the colours ride along. The Sun corresponds to 1, and the Sun's metal is gold; the Moon is 2 and silver; Mars is 9, and Mars is visiblyred in the night sky. Your lucky colour for a day is just that table, read through the day's number.
Numbers 4 and 7 are the honest exception: the seven visible planets never claimed them, so later traditions filled the gap: Rahu and Ketu in India, Uranus and Neptune in the post-telescope West. Their colours are the youngest and least settled on this page, and we'd rather tell you that than pretend the table was always complete.
Every correspondence on this page can be traced. Here is each colour's chain of custody, told without embellishment.
The chain of custody is short and old: the Sun corresponds to 1 (the source, the centre, the one everything orbits), and gold is the Sun made solid. Alchemists drew the same symbol for both. So wherever numerology hands you a 1 day, tradition hands you gold with it, along with Sunday and Sun-ruled Leo.
No colour photographs luck. But gold's associations are among the most stable in human culture: warmth, value, permanence outlast fashion. That is why a gold detail still reads as occasion in nearly every country on Earth.
The Moon corresponds to 2: the mirror to the Sun's 1, the partner, the responder. Its metal is silver, its day is Monday (Moon-day, literally), and its sign is Cancer. Where 1 radiates, 2 reflects; the colour carries the same temperament.
Tradition attaches silver to intuition and emotional intelligence, the lunar talents. Practically, it is the rare metallic that whispers instead of announcing, which is exactly the 2 energy the old tables describe.
Jupiter corresponds to 3, the number of expression and increase, and rules Thursday, Sagittarius and Pisces. Indian astrology dresses the planet in yellow outright: yellow sapphire is its gem, yellow cloth its offering. Western sources sometimes give Jupiter royal blue or purple instead; where traditions disagree, we say so.
Either way the temperament is the same: 3 is the storyteller's number, and yellow is the most conversational colour on the wheel — the one the eye finds first and forgives fastest.
Honesty first: 4 has the newest correspondence on this page. The old planet-to-number table runs out at the seven visible bodies, and 4 (with 7) was assigned later — to Rahu in India, to Uranus after 1781 in the West. Electric blue is the compromise both point at: Rahu's smoke-dark shades, Uranus's storm-glass blue.
The temperament fits anyway. Four is the builder's number (rules, grids, foundations) and Uranus is the planet of breaking exactly those. A 4 day carries both readings, which is why its colour looks like order about to arc.
Mercury corresponds to 5, the number of movement and the five senses, and rules Wednesday, Gemini and Virgo. India dresses the planet in green; the West gave it quicksilver, the metal that refuses to hold still, which is the same idea told in physics instead of colour.
Green also happens to be the luck colour of an entirely separate lineage — the Irish one, all shamrocks and green doors — and this site wears clover green for exactly that reason. Two traditions, one verdict.
Venus corresponds to 6, the number of home, harmony and responsibility to other people, and rules Friday, Taurus and Libra. Friday is literally Venus's day: the goddess is still in the word in vendredi and viernes. Its colours run from white through rose to copper, the planet's alchemical metal.
Six is the guardian's number, and pink is its most legible modern shorthand: affection made visible. The association is younger than the planet's — pink only split from red as its own meaning in the last few centuries — but it landed squarely on Venus's territory.
Honesty first: the traditions disagree about 7 more than about any other number. Vedic numerology gives it Ketu, the tail of the eclipse-dragon, coloured in smoke and ash; Western numerology gives it Neptune, planet of dreams and dissolving edges, coloured sea-green to violet. Violet is where the readings overlap — the spectrum's last visible step before ultraviolet, which is almost too neat.
Seven's temperament survives the disagreement intact: it is the analyst's and the mystic's number at once, and violet has carried exactly that double duty (scholarship and spirituality) since purple dye was worth its weight in silver.
Saturn corresponds to 8, the number of structure, karma and long games, and rules Saturday (Saturn's day, still intact in English), Capricorn and Aquarius. Vedic tradition dresses Shani in black and dark blue, with blue sapphire as a gem so potent it comes with warnings attached.
Eight is also the money number, and its colour agrees: navy and charcoal are what power dresses in when it doesn't need to say so. Nothing about Saturn is fast — the promise of an 8 day is not a windfall but a foundation that holds.
Mars corresponds to 9, the number of completion and full effort, and rules Tuesday, Aries and Scorpio. This is the least arbitrary correspondence in the whole system: the planet is visibly red, its metal is iron, and iron oxide is the pigment humans have painted luck with since the ice age.
Nine closes the cycle, and red is how cultures mark what matters most — thresholds, weddings, new years. If one colour has a claim to being humanity's default lucky colour, it is this one, by several thousand years.
| Sign | Ruler | Lucky colours | Lucky day |
|---|---|---|---|
| Aquarius | Saturn (trad.) / Uranus (mod.) | Electric blue, silver | Saturday |
| Pisces | Jupiter (trad.) / Neptune (mod.) | Sea green, lavender | Thursday |
| Aries | Mars | Red, scarlet | Tuesday |
| Taurus | Venus | Green, rose | Friday |
| Gemini | Mercury | Yellow, light blue | Wednesday |
| Cancer | The Moon | Silver, white | Monday |
| Leo | The Sun | Gold, orange, royal purple | Sunday |
| Virgo | Mercury | Green, brown | Wednesday |
| Libra | Venus | Pink, pale blue | Friday |
| Scorpio | Mars (trad.) / Pluto (mod.) | Deep red, black | Tuesday |
| Sagittarius | Jupiter | Purple, deep blue | Thursday |
| Capricorn | Saturn | Charcoal, forest green | Saturday |
Aquarius
Electric blue, silver · Saturday
Pisces
Sea green, lavender · Thursday
Aries
Red, scarlet · Tuesday
Taurus
Green, rose · Friday
Gemini
Yellow, light blue · Wednesday
Cancer
Silver, white · Monday
Leo
Gold, orange, royal purple · Sunday
Virgo
Green, brown · Wednesday
Libra
Pink, pale blue · Friday
Scorpio
Deep red, black · Tuesday
Sagittarius
Purple, deep blue · Thursday
Capricorn
Charcoal, forest green · Saturday
No colour changes your odds at anything a statistician could measure. A green shirt has never moved a lottery ball, and we won't pretend otherwise. What the tradition actually offers is older and more modest: a way of dressing with intent. Cultures kept these tables for thousands of years because colour reliably changes how you carry yourself and how a room reads you, which is a real effect, just not a supernatural one. We give you the tables, their origins, and that distinction, every time.
Add today's date digits together and reduce them to one number: July 15, 2026 gives 2+0+2+6+0+7+1+5 = 23 → 5. Each number carries a colour inherited from its planet, so a 5 day is a green day. Set your birth date on this site and the same arithmetic folds your own digits in, giving you a personal colour that differs from the universal one most days.
Deterministically, from the calendar: the date's digits reduce to a day number from 1 to 9, and each number maps to a colour through its classical planet: 1 is the Sun's gold, 2 the Moon's silver, 9 Mars's red. Same date, same colour, for everyone, everywhere. No randomness and nothing hidden.
Each sign inherits colours from its ruling planet: Sun-ruled Leo takes gold, Moon-ruled Cancer silver and white, Mars-ruled Aries red. The full table for all twelve signs is on this page, and each sign's own page carries the longer story.
Yes, and we say so where they do. The seven classical planets cover numbers 1, 2, 3, 5, 6, 8 and 9 consistently; numbers 4 and 7 were assigned later (to Rahu and Ketu in Vedic numerology, to Uranus and Neptune in the modern West) and 7's colour varies the most between sources. Where this page had to choose, it tells you what it chose and why.
Not in any measurable, odds-changing way. No colour has ever moved a lottery ball. What colour demonstrably does is change how you read yourself and how a room reads you, which is why the tradition never died. Wear it as intent, not insurance.
Depends whom you ask. China's answer has been red for millennia; Ireland's is green; the planetary tables would nominate gold, the Sun's colour. Red has the oldest claim — humans have marked luck and vitality with red ochre since the ice age — so if you want one answer, red, by several thousand years.