CSI

Case File · 001 · Colour Science Investigation

Stop guessing
hair colour.
Start investigating it.

Professional hair colour education for stylists who want to stop panicking through services and start making diagnostic decisions using the C.R.I.M.E. framework.

Founded by Samantha Blues · Professional Hair Colour Educator · Over 3 decades · Creator of CSI · Author of The Confidence Effect

The Problem

Most colour mistakes don't start in the bowl. They start before the formula is even mixed.

The Old Way · Guessing

  • “What formula did you use for this picture?”
  • “What toner cancels out orange?”
  • “I'll just put some ash on it and hope.”
  • “The hair looks fine, let's just go with 30 vol.”

The CSI Way · Investigating

  • “What is the canvas I am actually working on?”
  • “What residue is sitting on the hair from past services?”
  • “What evidence do I have from my strand test?”
  • “What method will achieve the goal with least damage?”

The Solution

The C.R.I.M.E. Framework

The diagnostic system for predictable colour results. Stop relying on memory and start relying on evidence.

C

Canvas

What hair am I actually working on? Starting level, condition, porosity, section differences, underlying pigment.

R

Residue

What is sitting in or on the hair? Artificial pigment, direct dye, toner stain, minerals, build-up, colour history.

I

Investigation

What evidence do I need before I commit? Strand testing, elasticity, porosity, history, risk level.

M

Method

What route gives the best result with least damage? Technique, timing, developer logic, sectioning, toning.

E

Execution

How do I control the result in real time? Application, saturation, processing checks, backwash decisions.

The Membership

This is not formula copying. This is colour thinking.

Monthly colour science training, CRIME framework lessons, correction case studies, toner logic, and canvas diagnosis tools.

Learn More About Membership

The Tools

CSI Resources & Training

Exhibit

CSI Membership

Monthly education and resources for professional colourists who want diagnostic colour confidence.

View on Stan Store →
Exhibit

The Confidence Effect

A book for hairdressers who want to shift client perception, lead consultations and charge with more confidence.

View on Stan Store →
Exhibit

CSI CRIME Framework

A professional diagnostic system for colourists who want predictable colour results.

View on Stan Store →
Exhibit

Colour Emergency Guide

A practical guide for students and stylists dealing with common colour problems.

View on Stan Store →
Exhibit

CSI Formulation System

A system for building colour decisions from canvas, pigment behaviour and method.

View on Stan Store →
Exhibit

Colour Panic Tool

A fast decision support tool for mid-service colour problems.

View on Stan Store →
Exhibit

Case File Resources

Training resources that help stylists work through colour problems like an investigator.

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Exhibit

Consultation Resources

Scripts and frameworks for stronger client communication and expectation control.

View on Stan Store →

The Book

The Confidence Effect

The Hairdresser's Guide to Subtle Influence

Silence self-doubt behind the chair, communicate value without apologising, lead consultations with more control, and charge like the expert you already are.

Discover The Book
The Confidence Effect — The Hairdresser's Guide to Subtle Influence by Samantha Blues

Witness Statements

5 stars from the chair.

Samantha gave me a system. I stopped panicking at the backwash and started thinking like an investigator. My corrections finally feel controlled.

Hannah M.

Salon owner · Glasgow

CRIME framework is the missing piece every colour course skipped. I read the canvas first now, not the inspiration photo.

Leah R.

Colourist · Manchester

Stopped copying formulas off Facebook groups. I understand why a toner pulled khaki and what to do about it before I rinse.

Priya S.

Senior stylist · London

Ready to stop guessing?

Join CSI Membership today and get the tools, frameworks and confidence to tackle any colour service.

Join CSI Membership