How to Reveal Both Paper Colors in a Flat Origami Tessellation

Call the paper’s two faces A and B. If every exposed region on your chosen display face comes from A, the finished tessellation will look like color A even when substantial areas of B are hidden inside the layers. Your task is to bring some of B into view and leave it uncovered.

Look for the boundary between the two visible colors, rather than simply counting mountain and valley folds. Abrashi Origami School’s color-change explanation treats the paper edge as the resource used to create these boundaries; its checkerboard example shows why the available edge length affects the design. A crease through an arbitrary interior region is therefore not a general instruction for producing a new colored patch. Colour change – part 1

The practical implication is that color placement belongs to the folding structure. Before changing a tessellation, identify which flap or edge supplies the reverse color and which layers would cover it when the model closes.

Use this decision aid before adding creases. It separates a simple edge treatment from a change to the repeating pattern itself.

Your intended result	What to look for	Next action
A contrasting strip along an edge	A straight, accessible margin outside the repeating folds	Test the margin turnover described below
A contrasting frame	A documented framed color-change variant	Follow that variant’s starting folds and layer arrangement
Reverse-color details throughout the pattern	Instructions showing those details in the finished model	Use that specific color-change design
A second color in an already collapsed interior	An identified route for bringing an edge or flap to the surface	Inspect the instructions before modifying the model

A designer-documented example is Kosmulski’s Framed Two-in-One Flower with Color Change. He describes beginning with a blintz—folding the corners to the center—then continuing with the standard version and hiding excess paper later. This demonstrates a planned color-change frame, with its own layer handling. His page does not list folding instructions for this variant, so the description should not be treated as a complete tutorial. Framed Two-in-One Flower with Color Change

Use a sheet whose two faces are visibly different. A colored face with a white reverse is sufficient; two differently colored faces also work. Check the actual sheet by turning over one corner under ordinary reflected light. This confirms the contrast you will have when the reverse is exposed. Models with color change

For a documented model, follow its starting-side instruction exactly. Record which of your colors corresponds to the diagram’s shaded face. If your first test produces the right pattern with the colors exchanged, use that record to decide the starting orientation for the next sheet.

Make the first sample large enough to inspect its layers. Eric Gjerde recommends larger paper when the working details become too small. His precreasing method repeatedly halves sections, reverses the new creases, and spreads grid development among the required directions as the divisions become finer. These are useful preparation methods when the chosen tessellation calls for a precreased grid. How-to: Pre-creasing

The following is an edge treatment for a tessellation that already has a straight, unused margin. It does not change the interior repeat. Use it only where the margin can turn onto the display face without pulling open a twist, crossing an interlocked section, or covering a detail you want to keep.

Begin with one edge. Two opposite edges can be treated independently afterward; a complete four-sided frame requires additional decisions at the corners.

1. Choose the display face. Lay the tessellation with the intended pattern facing upward.
2. Identify the spare strip. Find a straight outer margin that lies beyond the repeating structure. Inspect underneath it to confirm that it is accessible.
3. Choose the turnover line. Place it entirely within that spare margin, parallel to the outer edge. The distance from the edge to this line becomes the width of the exposed reverse-color strip.
4. Turn the edge inward. Fold the strip onto the display face. Its former underside should now be visible.
5. Check the layers before sharpening. Confirm that the colored strip remains exposed and that the neighboring repeat stays closed.
6. Set the crease. Flatten the strip along its length while keeping the patterned area in its existing arrangement.
7. Repeat on the opposite edge if wanted. Use the same strip width for matching accents, then inspect the whole sheet again.

For an illustrative measurement, suppose an edge has a 12 mm unused margin. A turnover line 5 mm from the outer edge creates a 5 mm reverse-color band and leaves 7 mm between that line and the patterned area. These dimensions are an example for planning your own margin, not specifications for a named tessellation.

Stop this method if the apparent border contains structural pleats or cannot lie straight independently of the pattern. In that situation, use a color-change version designed for the model rather than continuing the turnover across its working folds.

If you want colored details inside every repeat, start with instructions that explicitly produce that arrangement. A border treatment establishes a contrasting edge; it does not supply instructions for changing the colors of interior units. The edge-routing considerations illustrated by Abrashi explain why such a change can require a different crease pattern. Colour change – part 1

Before committing to the full sheet, fold the smallest sample that includes both the color-changing feature and a connection to its neighbor. A single isolated unit can show the intended color while leaving its eventual layer overlap unresolved.

Use this practical sample check:

• Identify the exact flap or edge that exposes the reverse.
• Close the neighboring unit as instructed.
• Check that the reverse-color region remains visible.
• Check that both units settle into their intended flat arrangement.
• Record the starting face and any orientation changes before repeating the sequence.

This sample check is a planning aid, not a substitute for the model’s diagrams. If the instructions leave the color-changing connection unexplained, a finished photograph alone may not provide enough information to reproduce it.

Diagnose the visible symptom before adding more folds. The aim is to locate a missing turnover, an incorrectly covered layer, or a margin that was never available for modification.

Symptom	What to inspect	Useful next step
The second color appears only underneath	Whether any reverse-facing flap reaches the display surface	Find the specified color-change step or use an accessible margin
The second color disappears when the next unit closes	Which neighboring layer covers it	Recheck the documented overlap order
A border fold opens nearby repeats	Whether the border includes structural folds	Undo the turnover and choose another approach
One unit differs from its neighbors	Starting orientation and local fold sequence	Compare it with the last correctly folded unit
The sample becomes difficult to manipulate	Working size and crease preparation	Try a larger sample before increasing the repeat count

For grid preparation, distinguish reversible precreases from the final mountain-and-valley arrangement. Gjerde recommends reversing grid creases to make collapse easier, while also noting that repeated manipulation can be unsuitable for flimsy paper. Apply the method with attention to the sheet you are using. How-to: Pre-creasing

Place the finished tessellation on a plain surface under reflected light and look directly at the intended display face. Both colors should remain visible without lifting a flap or holding part of the pattern open. Then inspect the edges and neighboring repeats to see whether the color treatment has displaced their layers.

For a simple accent, an unused margin offers a direct way to expose the reverse color. For a contrasting frame or repeated interior details, choose a documented color-change structure and verify its connected units on a small sample. The decisive question is always concrete: which part of the sheet brings the second color into view, and does it stay visible when the tessellation lies flat?

• Models with color change — Origami by Michał Kosmulski
• Colour change – part 1 — Abrashi Origami School
• Framed Two-in-One Flower with Color Change — Origami by Michał Kosmulski
• How-to: Pre-creasing — Eric Gjerde, Origami Tessellations