Each day of the week in Thailand is associated with a specific colour, believed to bring luck and protection. This tradition comes from Thai astrology, where each day is linked to a guardian deity — and each deity has a symbolic colour.

Your “lucky colour” is based on the day you were born.
For example, I was born on a Tuesday, so my lucky colour is pink — which is why it appears throughout my site.

Colors of the Day in Thailand

Monday (วันจันทร์ – wan jan) —
Yellow (สีเหลือง – sĭi‑lŭeang)

Tuesday (วันอังคาร – wan ang‑kaan) —
Pink (สีชมพู – sĭi‑chom‑puu)

Wednesday (วันพุธ – wan pút) —
Green (สีเขียว – sĭi‑kĭao)

Thursday (วันพฤหัสบดี – wan pá‑réu‑hàt‑sà‑bor‑dee) —
Orange (สีส้ม – sĭi‑sôm)

Friday (วันศุกร์ – wan sùk) —
Blue (สีฟ้า – sĭi‑fáa)

Saturday (วันเสาร์ – wan săo) —
Purple (สีม่วง – sĭi‑mûang)

Sunday (วันอาทิตย์ – wan aa‑tít) —
Red (สีแดง – sĭi‑daeng)

If you want to find out which day you were born on (and your lucky colour), you can check here:
https://www.dayofbirth.co.uk/

Hear the Days and Colours Spoken in Thai

This video from ThaiPod101 is a great way to hear the pronunciation:

God of the Day

According to ancient Thai customs (influenced by Hindu astrology), each day is protected by a deity — and each deity has a symbolic colour.

Monday — Yellow — Chandra

Chandra is the lunar deity and one of the Navagraha (nine planets) in Hinduism. Also known as Soma, he represents calmness, clarity, and the moon.

Tuesday — Pink — Mangala

Mangala represents Mars, the god of war. Depending on the myth, he is the son of Bhumi (Earth), Vishnu, or Shiva.

Wednesday — Green — Budha

Budha represents Mercury and is associated with intelligence, communication, and learning.

Thursday — Orange — Brihaspati

Brihaspati is linked to Jupiter and is considered a teacher of the gods, symbolising wisdom and guidance.

Friday — Blue — Shukra

Shukra represents Venus and is associated with brightness, clarity, and prosperity.

Saturday — Purple — Shani

Shani represents Saturn and is the god of justice, discipline, and karma.

Sunday — Red — Surya

Surya is the Sun god, symbolising power, energy, and vitality.

Conclusion

These colours are still widely recognised in Thailand today — from clothing choices to temple decorations and even special events.

If you want to learn more Thai culture basics, you might enjoy my post on
Useful Thai Phrases and Words.

Let me know in the comments which day you were born on and what your lucky colour is.