You've done what you could.....all you can do now is wait and see :-) You likely would have been fine leaving out the lime - hydrangeas prefer an acidic soil mix. And hydrangea cuttings are very easily rooted, however your timing may be off with these just based on time of year. Just stick in a pot of soil mix, keep moist (not wet) and see how they do. You will know if they 'take' as they will put out leaves and begin growing just like a established plant although they may be a bit slower and later.

As to what you have, that is is also a wait and see :-)) Hydrangeas don't come in 4 colors on a single plant and they don't have yellow flowers so who knows what it is you are growing!!

By coincidence, mopheads come in four colors: blue, pink, purple and white. Maybe the picture's purple color was made using an ingredient that faded to yellow when exposed to light/weather/etc.

Mopheads develop invisible flower buds in July-September (varies by location) and these open in the Spring. After Spring, reblooming mopheads can also produce another set of flower buds / blooms... in the summer-ish months and from the current year's new growth. Do not worry about blooms for now (2018) though. Let the plant recover and further develop its root system, just as if it was just planted today. Don't go crazy with fertilizers either. Once a year or so is usually fine (in Spring when they leaf out). If your soil is alkaline (ask a nearby plant nursery or neighbor), you may need to amend the soil with garden sulfur or aluminum sulfate per label directions. I do this once or twice a year.

Here is more info: https://plantaddicts.com/all-about-hydrangeas/