What Is The Standardized Color Code System For Marking Queen Bees? Master The International 5-Year Cycle

The international standard for marking queen bees relies on a five-year repeating color rotation determined by the last digit of the year the queen was born. The specific sequence is White (years ending in 1 or 6), Yellow (2 or 7), Red (3 or 8), Green (4 or 9), and Blue (5 or 0).

By marking a queen, you create an immediate, visual record of her age, which is vital for managing hive productivity and making replacement decisions. A common mnemonic to remember the sequence is "What, You Raise Green Bees?" (White, Yellow, Red, Green, Blue).

The Mechanics of the Color Code

The Five-Year Cycle

The system is designed to repeat every five years. Because queens rarely live longer than three to four years, there is virtually no risk of confusing a young queen with a very old one of the same color.

The current rotation is defined as follows:

White: Years ending in 1 and 6 (e.g., 2021, 2026)
Yellow: Years ending in 2 and 7 (e.g., 2022, 2027)
Red: Years ending in 3 and 8 (e.g., 2023, 2028)
Green: Years ending in 4 and 9 (e.g., 2024, 2029)
Blue: Years ending in 5 and 0 (e.g., 2025, 2030)

Remembering the Order

Memorizing the colors is easier with a simple phrase. The first letter of each word corresponds to the color in the sequence.

The standard mnemonic used by beekeepers is "What, You Raise Green Bees?" This helps ensure you always apply the correct color for the current season.

Tools and Application Standards

Industry Standard Markers

While the color code is universal, the tool used to apply it matters for the queen's safety. Water-based acrylic paint markers (such as Posca pens) are the industry standard.

These markers are preferred because they are non-toxic and possess low solvent content. High-solvent paints can harm the queen or overwhelm the colony with chemical scents.

Durability and Visibility

The paint used must be highly pigmented. This ensures the mark remains vibrant and easily spotting amidst thousands of worker bees.

When applied correctly, these water-based acrylics are durable enough to last the queen's entire productive lifespan.

Common Pitfalls and Safety

The Risk of Improper Application

The goal is a single, gentle touch on the thorax (the middle section). Using a marker with a soft tip helps prevent physical injury during application.

You must avoid getting paint on the queen's head (eyes/antennae), wings, or spiracles (breathing holes). Paint in these areas can disable or kill the queen.

Handling Stress

Catching and marking a queen induces stress. Beginners often squeeze too hard or take too long, which can damage the queen's reproductive organs.

If you are inexperienced, practice marking drones (male bees) first. They are larger, do not sting, and are less critical to the hive's immediate survival.

Making the Right Choice for Your Goal

Whether you are managing a small apiary or a commercial operation, adhering to this standard ensures your records are universally understood.

If your primary focus is determining queen viability: Check the color against the current year to instantly calculate her age; queens older than two years often see a decline in laying patterns.
If your primary focus is marking a new queen: Verify the current year's last digit and select the corresponding water-based acrylic marker (e.g., Green for 2024).
If your primary focus is purchasing queens: Ensure the breeder follows the international standard so you do not introduce a queen with an ambiguous age history.

Use the "What, You Raise Green Bees?" mnemonic to ensure you never lose track of your hive's most critical asset.

Summary Table:

Year Digit	Color	Mnemonic	Example Years
1 or 6	White	What	2021, 2026
2 or 7	Yellow	You	2022, 2027
3 or 8	Red	Raise	2023, 2028
4 or 9	Green	Green	2024, 2029
5 or 0	Blue	Bees?	2025, 2030

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