Literal: Now sky cloud color (topic marker) tropical (is), yeah.
Right now, the color of the sky and clouds is tropical, yeah.
Grammar
descriptive tag
Topic particle 은/는 marking contrast or topic
은
In this line, 은 is the topic particle attached to 색, making 색은 function as “as for the color” or “the color (topic).” It highlights ‘the color of the sky and clouds’ as the main thing being talked about and contrasts it with other possible aspects (like temperature or mood). In many sentences, 은/는 sets the frame of reference for what follows rather than simply marking grammatical subject or object.
오늘은 날씨가 좋아요.oneureun nalssiga joayo. — As for today, the weather is good.
저는 음악을 좋아해요.jeoneun eumageul johahaeyo. — As for me, I like music.
descriptive tag
Noun–noun–noun chain for "of" relationships
하늘 구름 색
The sequence 하늘 구름 색 literally stacks nouns: “sky cloud color.” In Korean, placing nouns together like this often creates an “of” relationship without using 의 every time, so 하늘 구름 색 means “the color of the sky and (its) clouds.” This noun chain acts as one larger noun phrase that 은 then marks as the topic.
학교 친구 이름을 잊어버렸어요.hakgyo chingu ireumeul ijeobeoryeosseoyo. — I forgot my school friend’s name.
한국 음식 맛이 아주 좋아요.hanguk eumsik masi aju joayo. — The taste of Korean food is very good.
