You're right: normal Japanese writing does not usually use spaces between words.
So this would normally be written as:
この寒色が好きだ。
Spaces are often added in beginner materials to make the word boundaries easier to see.
寒色 literally means cold colors, but in English the more natural term is usually cool colors or cool-toned colors.
It refers to colors on the cool side of the spectrum, such as blues, blue-greens, and similar shades.
Depending on context, 寒色 can refer to:
So the exact nuance depends on what the speaker is looking at or talking about.
This is one of the most common questions learners have.
In English, we say I like this color, where this color is the object of like.
But in Japanese, 好き does not behave like an ordinary verb such as eat or see. It behaves more like liked / pleasing / preferable.
So the thing that is liked is often marked with が:
That is why が is natural here.
Not in standard grammar, no.
好き is usually treated as a na-adjective or adjectival noun, not a regular verb.
That is why it patterns differently from verbs:
With 好き, the liked thing is commonly marked by が, not を.
Because 好き is not a complete plain-form predicate by itself in standard Japanese. It normally needs the copula:
So:
In casual conversation, Japanese often drops だ, so you may also hear:
That is very common in speech.
Yes.
Both が and は are possible, but they do slightly different things.
は can also add contrast, depending on context. For example, it can sound like:
So が is a neutral choice here, while は adds a topic or contrast feeling.
Japanese nouns usually do not mark singular vs. plural the way English does.
So 寒色 by itself does not automatically tell you whether it means:
The context tells you.
In this specific sentence, because of この, it most naturally sounds like the speaker is referring to this particular cool-toned color or this cool-color item.
It can be natural, but the context matters.
If you are pointing to a specific color swatch, design, or item and saying you like that cool-toned color, it works.
However, if you mean I like cool colors in general, Japanese would more naturally say something like:
So この寒色が好きだ is most natural when this specific color is visible or already known in the conversation.