Bu açık renkli gömlek bana daha uygun görünüyor.

In Turkish, adjectives normally come before the noun they describe, just like in English.

• açık renkli gömlek = light-colored shirt
• güzel ev = beautiful house
• küçük araba = small car

Here, açık renkli acts as an adjective phrase describing gömlek.

Renk means color.
The suffix -li means something like with / having / characterized by.

So:

• renk = color
• renkli = colored / having color

In açık renkli, the idea is literally something like with a light color, which naturally becomes light-colored in English.

You will see -li in many other words too:

• şekerli = with sugar / sugary
• tuzlu = salty / with salt
• evli = married (literally, “with a home/household” historically)

Because uygun takes the dative case in Turkish when you say something is suitable for someone.

• ben = I
• bana = to me / for me

So:

• Bu gömlek bana uygun. = This shirt is suitable for me.

This is a very common pattern:

• sana uygun = suitable for you
• ona uygun = suitable for him/her
• bize uygun = suitable for us

English uses for me, while Turkish uses the dative form bana.

Daha means more here.

So:

• uygun = suitable
• daha uygun = more suitable

The sentence is comparing this shirt with something else, even if that other thing is not explicitly mentioned.

For example, the implied meaning could be:

• This light-colored shirt seems more suitable for me
  (than the other one / than darker shirts / than that shirt)

Uygun means suitable, appropriate, or fitting, depending on context.

In this sentence, it means the shirt seems to suit the speaker better.

Examples:

• Bu saat bana uygun değil. = This time is not suitable for me.
• Bu renk sana çok uygun. = This color suits you very well.
• Uygun fiyat = reasonable price / suitable price

So uygun is a flexible word that often means something that fits a person, situation, need, or purpose.

Görünüyor comes from görünmek, which means to appear / to seem / to look.

In this sentence, it does not mean the shirt is actively looking at something.
It means it appears / it seems.

So:

• uygun görünüyor = seems suitable / looks suitable

This is a very natural Turkish way to soften a statement and make it sound like an impression rather than a firm fact.

Compare:

• Bu gömlek bana uygun. = This shirt is suitable for me.
• Bu gömlek bana uygun görünüyor. = This shirt seems suitable for me.

The second one sounds less direct and more observational.

The suffix -yor is the Turkish present continuous marker.

• görünmek = to appear / to seem
• görünüyor = it is appearing / it appears / it seems

In English, Turkish -yor does not always have to be translated as is -ing.
With verbs like görünmek, the natural English translation is often simply seems or looks.

So although görünüyor is literally a present continuous form, the best English here is:

• seems
• looks

not necessarily is appearing.

Turkish often does not use a separate word for is/am/are in the present tense when making simple statements.

For example:

• Bu gömlek güzel. = This shirt is beautiful.
• Hava soğuk. = The weather is cold.
• Bu bana uygun. = This is suitable for me.

In your sentence, the main predicate is actually görünüyor, so there is already a verb present. But inside daha uygun görünüyor, the adjective uygun does not need a separate is.

The sentence is:

• Bu açık renkli gömlek = subject
• bana = to me / for me
• daha uygun = more suitable
• görünüyor = seems

So the structure is roughly:

[Subject] + [for me] + [more suitable] + [seems]

Turkish often puts the verb at the end, so this is very normal.

A very literal breakdown would be:

• This light-colored shirt to-me more suitable seems.

That sounds unnatural in English, but it helps show the Turkish structure.

Yes, bu means this.

Turkish does not have articles like a or the.

So:

• gömlek can mean shirt / a shirt / the shirt, depending on context
• bu gömlek specifically means this shirt

In this sentence, bu already makes the noun specific, so this light-colored shirt is the natural translation.

Yes, but the meaning would become less specific.

• Bu açık renkli gömlek daha uygun görünüyor.
  = This light-colored shirt seems more suitable.

That could mean suitable in general, or suitable in the situation.

But:

• Bu açık renkli gömlek bana daha uygun görünüyor.
  = This light-colored shirt seems more suitable for me.

So bana is important because it tells us whose point of view or suitability is being talked about.

Because açık by itself can mean several things, such as:

• open
• light (in color)
• clear

Using açık renkli makes the meaning more explicit: light-colored.

Compare:

• açık mavi = light blue
• açık kapı = open door
• açık renkli gömlek = light-colored shirt

So renkli helps make it clear that we are talking about color.

Sometimes, but the meaning would change slightly.

• uygun = suitable / appropriate / fitting
• yakışıyor = suits / looks good on

So:

• Bu açık renkli gömlek bana daha uygun görünüyor.
  = This light-colored shirt seems more suitable for me.

If you said:

• Bu açık renkli gömlek bana daha çok yakışıyor.
  = This light-colored shirt suits me better / looks better on me.

That version focuses more on appearance and style.
The original sentence with uygun can be broader: color, style, appropriateness, personal fit, etc.