Convert Goldwell Topchic to Küül Color System

Q: How many Topchic shades have an exact equivalent in Color System?

Of the 22 Topchic shades, 18 have an exact equivalent in Color System, 4 approximate. The level (1-10) is universal; what varies is the reflect.

Find the equivalent for each Goldwell Topchic shade in Küül Color System. Complete chart with levels, reflects, and match confidence.

Remember that equivalences are approximate. Each brand has proprietary pigments and bases that produce slightly different results. We always recommend doing a strand test when switching brands.

Topchic	Name	Color System	Name	Match
Level 2
2N	Black	2	Extra Dark Brown	Exact
Level 3
3N	Dark Brown	3	Dark Brown	Exact
Level 4
4N	Medium Brown	4	Brown	Exact
Level 5
5N	Light Brown	5	Light Brown	Exact
5G	Light Golden Brown	5	Light Brown	Approximate
5K	Light Copper Brown	5	Light Brown	Approximate
5R	Light Red Brown	5.5	Light Mahogany Brown	Approximate
Level 6
6N	Dark Blonde	6	Dark Blonde	Exact
6A	Dark Ash Blonde	6.1	Dark Ash Blonde	Exact
6G	Dark Golden Blonde	6.34	Dark Golden Copper Blonde	Approximate
6K	Dark Copper Blonde	6.34	Dark Golden Copper Blonde	Exact
6R	Dark Red Blonde	6.66	Dark Intense Red Blonde	Exact
Level 7
7N	Medium Blonde	7	Blonde	Exact
7A	Medium Ash Blonde	7.1	Ash Blonde	Exact
7G	Medium Golden Blonde	7.3	Golden Blonde	Exact
7K	Medium Copper Blonde	7.44	Intense Copper Blonde	Exact
Level 8
8N	Light Blonde	8	Light Blonde	Exact
8A	Light Ash Blonde	8.1	Light Ash Blonde	Exact
8G	Light Golden Blonde	8.3	Light Golden Blonde	Exact
Level 9
9N	Very Light Blonde	9	Very Light Blonde	Exact
9A	Very Light Ash Blonde	9.1	Very Light Ash Blonde	Exact
Level 10
10N	Lightest Blonde	10	Lightest Blonde	Exact

How to read the match: Exact = same level and same reflect · Close = same level, same reflect family · Approximate = same level in natural, or adjacent level with the same reflect. Hover each badge for that row's reason.

Of the 22 Topchic shades, 18 exact and 4 approximate in this chart with Color System. For example, Topchic's 6N maps to Color System's 6. Natural reflects cross over best; red ones need more adjustment.

Topchic writes the reflect with a letter after the level (7N = medium natural blonde); Color System uses a dot (7.44 = intense copper blonde; .2 = pearl/iridescent, .7 = violet). The level (1-10) stays the same; what changes when converting is how the reflect is written.

View reverse: Küül Color System to Goldwell Topchic

We answer your questions

Questions about Topchic and Color System

Common questions when converting between these brands

How many Topchic shades have an exact equivalent in Color System?

Of the 22 Topchic shades, 18 have an exact equivalent in Color System, 4 approximate. The level (1-10) is universal; what varies is the reflect.

Are brand equivalences exact?

No. Equivalences are approximate because each brand uses different pigments, bases, and concentrations. The level (1-10) is universal, but the reflect result may vary. We always recommend doing a strand test when switching brands.

Can I mix hair color from different brands?

It's not recommended. Each brand formulates its products with specific chemistry (pH, alkalizing agent, pigment system). Mixing brands can create unpredictable reactions and unwanted results. Always use color and developer from the same brand.

What if the exact shade doesn't exist in the other brand?

The tool shows you the closest available shade. If you need a very specific result, you can combine two shades from the target brand (for example, mixing a natural with an ash to get a soft ash). Blendsor calculates these mixes automatically.

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Convert Goldwell Topchic to Küül Color System

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Questions about Topchic and Color System

Charts give you the equivalent.Blendsor gives you the full formula for that hair: ratio, developer and timing.

Charts give you the equivalent.
Blendsor gives you the full formula for that hair: ratio, developer and timing.