The two main ways to knit with two colors
Two-color knitting uses either stranding (carrying the unused color across the back of your work) or intarsia (using separate yarn lengths for each color block). Stranding works best when you switch colors every few stitches — think Fair Isle patterns or small geometric designs. Intarsia works best when you have large blocks of solid color, like a colored square on a plain background, because it avoids the bulk of carrying yarn you won't use for many rows.
Most beginners start with stranding because it requires only two balls of yarn and no bobbins or extra setup. The main challenge is keeping the tension even so your floats (the strands running across the back) don't pull the fabric tight or sag loose.
Key Takeaways
- Stranding means carrying your unused color loosely across the back of your work, switching colors every few stitches in patterns like Fair Isle.
- Keep floats loose enough that your fabric doesn't pucker — a common mistake is pulling the carried yarn too tight.
- Hold one color in each hand (one over your index finger, one over your middle finger) to keep tension consistent and speed up your work.
- Intarsia uses separate yarn lengths for each color block and works better for large solid areas than for frequent color changes.
- Weaving in floats longer than five stitches prevents them from snagging and keeps the inside of your garment neat.
How to strand two colors in the same row
Hold one color in your right hand (over your index finger) and one in your left hand (over your middle finger), the way you would if you were switching between English and Continental knitting styles. This is called two-handed knitting and it keeps your tension steady because each hand maintains its own rhythm.
When your pattern tells you to knit with color A, pick up the yarn in your right hand and knit the number of stitches the pattern calls for. When you switch to color B, drop color A and pick up color B from your left hand. The key is to drop the old color completely before picking up the new one — if you hold both, you'll create a twisted loop that shows on the front of your work.
The unused color sits on the back of your fabric as a float. Keep it loose: if you pull it tight, your fabric will pucker and bunch. A good test is to be able to slip your pinky under the float without forcing it. Too loose and the float will sag; too tight and your stitches will distort.
Weaving in floats to prevent snagging
If your pattern has a float longer than five stitches, weave the unused yarn through the stitches on the back of your work as you knit. This prevents the float from catching on fingers or jewelry when you wear the finished piece.
To weave in a float, insert your right needle into the next stitch as normal, but before you complete the knit stitch, bring the unused yarn over the top of your right needle, then under it again. This traps the float under your working stitches without creating a visible line on the front. Do this every other stitch or every third stitch, depending on how long the float is — the goal is to anchor it without making the back of your work too thick.
Some knitters prefer to weave in floats after the piece is finished, using a tapestry needle to thread the yarn through the backs of stitches. This gives you more control and lets you see exactly where the float sits, but it takes longer than weaving as you go.
Intarsia for large blocks of solid color
Intarsia uses a separate length of yarn for each color section, so you never carry yarn across the back. This keeps your fabric flat and lightweight, which matters when you're knitting a large colored area — a sweater with a solid-colored yoke, for example, or a blanket with a big geometric design.
Wind each color onto a bobbin (a small spool that holds yarn and prevents tangling) or use a yarn card — a piece of cardboard with notches that hold yarn lengths. When you reach a color change in your pattern, drop the old color and pick up the new one. Twist the two yarns around each other where they meet to close the gap and prevent a hole from forming.
The twist is essential: bring the old color over the new color, then pick up the new color from underneath. This locks them together. If you straightforward switch colors without twisting, you'll have a visible gap in your fabric.
Reading a two-color knitting pattern
Two-color patterns use a chart instead of written instructions. Each square on the chart represents one stitch, and each color represents a different yarn. A key at the side of the chart tells you which color is which — usually one color is shown as a filled square and the other as an empty square or a different shade.
Read the chart from right to left on the first row (because you knit from right to left), then left to right on the second row, then right to left again. This matches the direction your stitches actually go. If the pattern is symmetrical, you can often read it the same way every row, but check the instructions to be sure.
Many patterns tell you how many stitches each color should cover — for example, "knit 3 stitches in red, 2 stitches in white, 3 stitches in red." Count carefully, because a single missed stitch will throw off the whole pattern.
Fixing common tension problems
The most common mistake is pulling floats too tight, which makes your fabric pucker and shrink. If you notice your work is bunching up where you switch colors, loosen your tension on the carried yarn. Some knitters deliberately knit the stitches slightly looser when they pick up a new color, then tighten back up once the float is find.
If your floats are too loose and sag, your tension is too relaxed. The fix is to pull gently on the working yarn right after you switch colors, just enough to take up the slack. You'll develop a feel for this after a few rows.
Twisted stitches at color changes usually mean you picked up the new color from the wrong side or didn't drop the old color completely. Look at the base of the stitch where the colors meet — it should look like a normal knit stitch, not a twisted loop. If you see a twist, you can fix it on the next row by knitting through the back loop instead of the front.
Choosing yarn colors that work together
High contrast makes patterns easier to see and mistakes easier to spot. A dark color and a light color (navy and cream, black and white, charcoal and yellow) show the pattern clearly. If you use two colors that are similar in brightness — two shades of blue, or two grays — the pattern will be hard to see and mistakes will be harder to catch.
Yarn weight matters too. If one yarn is thicker than the other, your stitches won't be even and the pattern will look lopsided. Use the same weight for both colors, and ideally the same fiber content so they have the same stretch and drape.
Frequently Asked Questions
Can I use stranding if the colors switch every stitch?
Technically yes, but it's slow and creates very thick floats. If your pattern changes color every stitch, intarsia or a technique called pixel knitting (knitting one stitch at a time in each color) works better. Stranding is most practical when you knit at least two or three stitches in each color before switching.
What's the difference between a float and a weave?
A float is the strand of yarn running across the back of your work when you carry a color you're not currently using. A weave is when you thread that float under or over the stitches as you knit, so it doesn't sit loose on the back. Weaving prevents long floats from snagging but adds thickness to your fabric.
Do I have to use bobbins for intarsia?
No. Bobbins keep yarn from tangling when you have many colors, but for two colors you can straightforward hold the yarn lengths in your hands or wind them onto yarn cards. Some knitters just use small balls of yarn. The main point is keeping each color separate so the yarns don't twist around each other.
Why does my two-color knitting look bumpy on the back?
Uneven tension on floats or weaving creates bumps. If you're weaving in floats, make sure you're weaving every other stitch or every third stitch consistently, not randomly. If you're stranding, check that you're keeping the same tension on both colors — one shouldn't be noticeably tighter than the other.
Can I knit two colors in the round the same way?
Yes. When you knit in the round, you always read the chart from right to left (because you're always moving in one direction around the circle), and you carry colors the same way — either stranding or intarsia. The main difference is that you see the front of your work as you knit, so mistakes are easier to spot right away.