Opacity control in Figma - Cell-by-Cell Formula Trace

Sample Data

This data shows different shapes with their base colors and opacity percentages. The resulting color is the base color combined with the opacity as an RGBA value.

Cell	Value
A1	Object
B1	Base Color
C1	Opacity (%)
D1	Resulting Color
A2	Circle
B2	#FF0000
C2	50
D2	rgba(255,0,0,0.5)
A3	Square
B3	#0000FF
C3	75
D3	rgba(0,0,255,0.75)
A4	Triangle
B4	#00FF00
C4	30
D4	rgba(0,255,0,0.3)

Formula Trace

Resulting Color = rgba(R, G, B, Opacity/100)

Step 1: Convert Hex color #FF0000 to RGB (255, 0, 0)

Step 2: Divide Opacity 50 by 100

Step 3: Combine RGB and opacity to form rgba(255, 0, 0, 0.5)

Cell Reference Map

    A       B         C         D
1 |Object |Base Color|Opacity %|Resulting Color
2 |Circle |#FF0000  |50       |rgba(255,0,0,0.5)
3 |Square |#0000FF  |75       |rgba(0,0,255,0.75)
4 |Triangle|#00FF00 |30       |rgba(0,255,0,0.3)

The formula uses the Base Color in column B and Opacity in column C to calculate the Resulting Color in column D.

Result

    A       B         C         D
1 |Object |Base Color|Opacity %|Resulting Color
2 |Circle |#FF0000  |50       |rgba(255,0,0,0.5)
3 |Square |#0000FF  |75       |rgba(0,0,255,0.75)
4 |Triangle|#00FF00 |30       |rgba(0,255,0,0.3)

The resulting color column shows the base color combined with the opacity as an RGBA color string, which controls transparency in design.

Sheet Trace Quiz - 3 Questions

What does the opacity value 50 represent in the formula?

A 50% transparency or 0.5 alpha

B 50% brightness

C 50% saturation

D 50% hue

Key Result

Opacity control converts percentage opacity to decimal alpha and combines with RGB color to form RGBA color.

Practice

1. What does setting the opacity to 0% do to an object in Figma?

easy

A. Makes the object completely invisible

B. Makes the object fully visible

C. Changes the object color to white

D. Locks the object from editing

Solution

1. Step 1: Understand opacity scale

   Opacity ranges from 0% (invisible) to 100% (fully visible).

2. Step 2: Apply opacity 0%

   Setting opacity to 0% means the object is fully transparent and cannot be seen.

3. Final Answer:

   Makes the object completely invisible -> Option A

4. Quick Check:

   Opacity 0% = Invisible [OK]

Hint: Opacity 0% means fully invisible, 100% fully visible [OK]

Common Mistakes:

• Confusing opacity 0% with white color
• Thinking opacity 0% locks the object
• Assuming opacity 0% makes object semi-transparent

2. Which of the following is the correct way to set opacity to 50% in Figma's Properties panel?

easy

A. Type 500 in the opacity input box

B. Type 0.5 in the opacity input box

C. Type 5 in the opacity input box

D. Type 50 in the opacity input box

Solution

1. Step 1: Check opacity input format

   Figma opacity is set as a percentage from 0 to 100, not decimal.

2. Step 2: Identify correct input for 50%

   Typing 50 means 50% opacity, which is half transparent.

3. Final Answer:

   Type 50 in the opacity input box -> Option D

4. Quick Check:

   Opacity input uses percentage numbers [OK]

Hint: Use whole numbers 0-100 for opacity, not decimals [OK]

Common Mistakes:

• Entering decimal like 0.5 instead of 50
• Typing values greater than 100
• Confusing opacity with fill color values

3. If a rectangle has opacity set to 30% and a blue fill color, what will be the visual effect on a white background?

medium

A. The rectangle appears white

B. The rectangle appears as a light blue transparent shape

C. The rectangle appears fully blue and opaque

D. The rectangle is invisible

Solution

1. Step 1: Understand opacity effect on color

   Opacity reduces the color's visibility by making it transparent.

2. Step 2: Apply 30% opacity on blue fill

   Blue color will show but faintly, blending with white background.

3. Final Answer:

   The rectangle appears as a light blue transparent shape -> Option B

4. Quick Check:

   Low opacity = lighter, transparent color [OK]

Hint: Lower opacity means color looks lighter and see-through [OK]

Common Mistakes:

• Thinking opacity changes the fill color itself
• Assuming 30% opacity means mostly opaque
• Confusing opacity with brightness

4. You set an object's opacity to 120% in Figma. What will happen?

medium

A. Figma will show an error and not accept the value

B. The object will become invisible

C. The opacity will be capped at 100%

D. The object will become semi-transparent

Solution

1. Step 1: Check valid opacity range

   Opacity values must be between 0% and 100% in Figma.

2. Step 2: Understand input behavior for out-of-range values

   Figma caps values above 100% to 100%, no error shown.

3. Final Answer:

   The opacity will be capped at 100% -> Option C

4. Quick Check:

   Opacity max is 100%, inputs above are capped [OK]

Hint: Opacity cannot exceed 100%, values above are limited [OK]

Common Mistakes:

• Expecting an error message for invalid opacity
• Thinking opacity above 100% makes object invisible
• Assuming opacity can be more than fully visible

5. You want to highlight a button by making the background color fully visible but the icon on top semi-transparent at 40% opacity. How should you set the opacity values?

hard

A. Set button background opacity to 100% and icon opacity to 40%

B. Set button background opacity to 40% and icon opacity to 100%

C. Set both button background and icon opacity to 40%

D. Set both button background and icon opacity to 100%

Solution

1. Step 1: Identify desired visibility for button background

   The background should be fully visible, so opacity must be 100%.

2. Step 2: Identify desired visibility for icon

   The icon should be semi-transparent, so set opacity to 40%.

3. Final Answer:

   Set button background opacity to 100% and icon opacity to 40% -> Option A

4. Quick Check:

   Background fully visible + icon semi-transparent = Set button background opacity to 100% and icon opacity to 40% [OK]

Hint: Full opacity for background, lower opacity for overlay elements [OK]

Common Mistakes:

• Setting background opacity too low and losing visibility
• Making icon fully opaque when semi-transparent is needed
• Confusing which element needs which opacity