Why a color chart is not a shopping list
DASMA's spring color document is intended for manufacturers, not homeowner replacement work. It explains that color does not capture all important dimensions and material characteristics. A match in paint therefore does not establish that an online part suits your door.
Gather records without handling the spring
Existing door paperwork, the original installation invoice and any previous spring-service record can help explain what equipment is installed. Share a safely visible door identification label if available. Do not climb beside a damaged assembly, measure a loaded spring, remove brackets or release cables to collect information. If you have no records, say so; missing paperwork is something to account for during assessment, not a reason to guess.
Ask what the proposed replacement is based on
A useful repair discussion identifies the door being supported and the reason for the selected replacement. Ask whether the quote includes inspection of the related lifting hardware and a check of the completed door's operation. A higher cycle-life claim is a separate question from correct fit. Replacing a broken component should not leave you relying on the opener to mask a door-balance problem.
Your questions
Does the same paint color mean two springs are interchangeable?
No. The color is only partial identification, and other characteristics can differ. A trained technician must determine suitability for the door.
Can I use the color chart to order a spring for a technician to fit?
Agree on the specification with the technician first. Ordering from the paint mark alone can leave you with an unsuitable component and an incomplete repair plan.
What if the paint is faded or missing?
Do not clean or handle a spring to uncover a code. Tell the technician what records you have and arrange an assessment of the installed system.