COLOR REFERENCE
Hair system color codes are indexes—not screen colors.
Use notation to locate a reference, then approve the actual hair under repeatable lighting.
INDUSTRY COMMON KNOWLEDGE
How common notation is read.
The same code can appear different across factories, fiber types, processing histories, lengths, curl conditions, lighting, and batches. Use it as an index, not a visual promise.
#1 · #2 · #4 · #5
How to read it
A single-number reference indexes a solid color family within a supplier's own reference system.
What to verify
Treat the code as a lookup key and compare the physical ring or sample; the label is not a universal visual standard.
#1B
How to read it
A letter suffix is part of the supplier's color-family label and distinguishes that reference from the unsuffixed number.
What to verify
Do not infer an exact shade or processing recipe from the suffix; approve the labeled physical swatch.
1B10 · 1B20 · 1B60
How to read it
In common grey-blend notation, the trailing number identifies the stated grey-hair percentage mixed with the named base color.
What to verify
Confirm the fiber character, percentage, distribution by zone, and physical appearance under consistent light.
3/4 mix
How to read it
A slash-style mix records a blend between two referenced color families rather than one solid code.
What to verify
Record the intended proportion and approve the exact physical blend because the shorthand alone does not define the result.
1B/613 blend
How to read it
A slash between two full color references can identify a requested blend of those two supplier-indexed families.
What to verify
State the intended proportion and distribution; the paired codes alone do not define how the fibers are mixed.
#4 with #27 highlights
How to read it
A written highlight instruction separates the main color reference from a second reference used for selected lighter strands or zones.
What to verify
Specify highlight placement, distribution, strand character, and the physical references used for both codes.
Root: #2 · Length: #4
How to read it
A root-and-length instruction assigns different supplier color references to defined portions of the same hair strand.
What to verify
Record the transition placement and approve a sample; neither code defines the transition by itself.
Front: 1B20 · Crown: 1B10
How to read it
A zone instruction assigns different color or grey-blend references to named areas of the base.
What to verify
Mark every zone on the template or specification and verify the transitions between them on a physical sample.
Use the complete approval workflow in the hair system color-matching guide →
Havelock Hair product specifications are published only after physical-sample verification. They are not listed here yet.