App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 200 · 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. The Send button is 36 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 40 px tall
   Back button: 44 px tall
   Next button: 36 px tall
3. 3.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) light grey on white (d) yellow on white
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
6. 6.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) light grey on white
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 36 px tall
   Back button: 40 px tall
   Next button: 36 px tall
   Done button: 48 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 48 px tall
   Help button: 44 px tall
   Next button: 60 px tall
   Send button: 32 px tall
9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
10. 10.True or false: a clear word like Save is good button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
13. 13.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) pale pink on white (d) black on yellow
14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 44 px tall
    Next button: 44 px tall
16. 16.True or false: a tiny 20 px button is good button design. (a) True (b) False
17. 17.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on white (d) dark blue on black
18. 18.🌗 Is pale pink on white 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 Done button is 36 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) yellow on white
21. 21.True or false: space between buttons is poor button design. (a) True (b) False
22. 22.True or false: icons with no meaning is good button design. (a) False (b) True
23. 23.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) red on green (d) black on yellow
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 40 px tall
    Help button: 64 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 32 px tall
    Start button: 52 px tall
    Cancel button: 48 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 56 px tall
    Back button: 64 px tall
    Start button: 44 px tall (a) Back (b) Start (c) Help (d) Next
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: a big, easy tap area is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
32. 32.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) black on pale grey
33. 33.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.True or false: grey text on grey is poor button design. (a) True (b) False
36. 36.True or false: a clear word like Save is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 60 px tall
    Next button: 40 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 40 px tall
    Save button: 56 px tall
    Help button: 36 px tall

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