App Dev Worksheet: Button Size and Contrast

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

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