
kühl
cool
A temperature that is felt as pleasant or slightly cold, but not freezing.
An einem kühlen Sommerabend saßen wir noch lange draußen.
On a cool summer evening, we sat outside for a long time.
cool
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cool
A temperature that is felt as pleasant or slightly cold, but not freezing.
An einem kühlen Sommerabend saßen wir noch lange draußen.
On a cool summer evening, we sat outside for a long time.

cool
Describes a person or their behavior as distant, reserved, and not very emotional or warm.
Sie antwortete mit einem kühlen Lächeln und ging weiter.
She answered with a cool smile and walked on.

to keep a cool head
To stay calm and think clearly in a difficult or stressful situation.
Trotz des Feueralarms bewahrte sie einen kühlen Kopf und half den anderen.
Despite the fire alarm, she kept a cool head and helped the others.

cool
Refers to colors (such as blue, green, or violet) that have a cold, calming, or distant effect.
Für das Schlafzimmer haben wir kühle Farbtöne gewählt.
We chose cool shades for the bedroom.
The meaning of 'kühl' (cool) depends strongly on the context. If it refers to weather or drinks, it is about temperature. If it describes a person or a reaction, the distant, emotional meaning is intended.
Die kühle Brise am Meer war sehr erfrischend.
The cool breeze by the sea was very refreshing.
The expression 'einen kühlen Kopf bewahren' (to keep a cool head) is a fixed unit. It means to stay calm and rational in a stressful situation.
Als der Computer abstürzte, hat sie einen kühlen Kopf bewahrt und das Problem gelöst.
When the computer crashed, she kept a cool head and solved the problem.
In connection with temperature, 'kühl' (cool) is often used for weather, air, or drinks. Typical combinations are 'kühles Wetter' (cool weather), 'ein kühler Wind' (a cool wind), or 'ein kühles Getränk' (a cool drink).
Nach dem Sport trinke ich gerne ein kühles Wasser.
After exercising, I like to drink a cool water.
When 'kühl' (cool) describes a person or their behavior, typical combinations are 'ein kühler Empfang' (a cool reception), 'ein kühles Lächeln' (a cool smile), or 'kühle Distanz wahren' (to maintain cool distance).
Ihre Reaktion war eher kühl und abweisend.
Her reaction was rather cool and dismissive.
You can recognize the meaning connected with colors from words like 'Farbe' (color), 'Farbton' (shade), or 'Einrichtung' (interior design/furnishings). It then refers to colors like blue or green.
Das Wohnzimmer ist in kühlen Blautönen gestrichen.
The living room is painted in cool shades of blue.
cool
Cool and kühl can both express a pleasantly low temperature. Kühl is the standard German word for this. Cool is a less common Anglicism in this meaning and, without a clear temperature context, can easily be understood as a positive evaluation.

Heute fühlt sich die Luft am See angenehm kühl an.
Today, the air by the lake feels pleasantly cool.
Heute fühlt sich die Luft am See angenehm cool an.
Today, the air by the lake feels pleasantly cool.