App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 612 · 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.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) dark blue on white (d) black on yellow
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Help button: 32 px tall
   Start button: 60 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Start button: 64 px tall
   Send button: 40 px tall
   Save button: 64 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 52 px tall
   Cancel button: 28 px tall
   Send button: 68 px tall (a) Cancel (b) Send (c) Save
5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
6. 6.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) white on dark green
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 68 px tall
   Send button: 48 px tall
   Start button: 32 px tall
   Done button: 68 px tall (a) Save (b) Done (c) Start (d) Send
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 32 px tall
   Start button: 44 px tall
   Next button: 52 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 68 px tall
    Help button: 24 px tall
    Start button: 68 px tall (a) Send (b) Help (c) Cancel (d) Start
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 52 px tall
    Cancel button: 32 px tall
12. 12.True or false: strong colour contrast is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
14. 14.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on yellow (d) dark blue on white
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 44 px tall
    Start button: 56 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 52 px tall
    Help button: 52 px tall (a) Cancel (b) Save (c) Help
17. 17.True or false: a big, easy tap area is poor button design. (a) False (b) True
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
20. 20.🌗 Is dark blue on black 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. How many of these buttons follow the rule?
    Save button: 44 px tall
    Cancel button: 60 px tall
    Back button: 64 px tall
22. 22.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) dark blue on white (d) white on black
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 56 px tall
    Cancel button: 24 px tall (a) Cancel (b) Save (c) Help
25. 25.True or false: strong colour contrast is poor button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 60 px tall
    Send button: 36 px tall
    Start button: 48 px tall (a) Start (b) Save (c) Help (d) Send
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
28. 28.True or false: a clear word like Save is poor button design. (a) True (b) False
29. 29.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
31. 31.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Help button: 44 px tall
    Send button: 36 px tall
    Save button: 36 px tall
33. 33.True or false: space between buttons is poor button design. (a) False (b) True
34. 34.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on dark green (d) white on black
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 52 px tall
    Back button: 32 px tall (a) Save (b) Start (c) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 64 px tall
    Start button: 56 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?

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