Verbseoul.
하다 verb (adj)
거무스름하다geomuseureumhadato be dark-colored

To say to be dark-colored politely in the present tense, use 거무스름해요 (guh-moo-seu-reum-hae-yoh). Below is the full conjugation of 거무스름하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
거무스름해
guh-moo-seu-reum-hae
거무스름해요
guh-moo-seu-reum-hae-yoh
거무스름합니다
guh-moo-seu-reum-hahm-nee-dah
Past
거무스름했어
guh-moo-seu-reum-hae-ssuh
거무스름했어요
guh-moo-seu-reum-hae-ssuh-yoh
거무스름했습니다
guh-moo-seu-reum-hae-sseum-nee-dah
Future
거무스름할 거야
guh-moo-seu-reum-hahl- -guh-yah
거무스름할 거예요
guh-moo-seu-reum-hahl- -guh-yae-yoh
거무스름할 겁니다
guh-moo-seu-reum-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
거무스름하세요
guh-moo-seu-reum-hah-sae-yoh
Suggestion / Let's Polite (요)
거무스름해요
guh-moo-seu-reum-hae-yoh
Question Polite (요)
거무스름해요?
guh-moo-seu-reum-hae-yoh-?
Connective “and” — (고)
거무스름하고
guh-moo-seu-reum-hah-goh
Conditional “if” — (면)
거무스름하면
guh-moo-seu-reum-hah-myuhn
Noun form — (기)
거무스름함
guh-moo-seu-reum-hahm