App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 2 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 48 px tall
   Done button: 52 px tall
   Next button: 44 px tall
   Start button: 68 px tall (a) Send (b) Next (c) Done (d) Start
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 48 px tall
   Save button: 28 px tall
   Back button: 52 px tall
   Next button: 64 px tall (a) Next (b) Save (c) Back (d) Cancel
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
6. 6.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on black (d) white on dark green
7. 7.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) pale pink on white (d) yellow on white
8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
9. 9.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on pale grey
11. 11.True or false: strong colour contrast is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Done button: 52 px tall
    Save button: 60 px tall (a) Next (b) Save (c) Done
15. 15.True or false: grey text on grey is good button design. (a) False (b) True
16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.True or false: icons with no meaning is good button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Save button: 68 px tall
    Cancel button: 60 px tall (a) Cancel (b) Back (c) Save
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 36 px tall
    Help button: 44 px tall
23. 23.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) white on dark green
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Help button: 52 px tall
    Cancel button: 32 px tall (a) Cancel (b) Help (c) Done
25. 25.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) red on green (d) pale pink on white
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
27. 27.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) white on dark green (d) black on yellow
29. 29.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) yellow on white
30. 30.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
32. 32.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Help button: 72 px tall
    Start button: 24 px tall (a) Help (b) Save (c) Start
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Save button: 36 px tall
    Cancel button: 56 px tall
    Back button: 48 px tall
35. 35.True or false: icons with no meaning is poor button design. (a) False (b) True
36. 36.True or false: a big, easy tap area is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Back button: 32 px tall
    Send button: 60 px tall
    Done button: 48 px tall (a) Next (b) Send (c) Done (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Done button: 64 px tall
    Back button: 56 px tall (a) Done (b) Help (c) Back
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 48 px tall
    Next button: 48 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?

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