App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 153 · 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.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Save button: 48 px tall
   Back button: 64 px tall
   Cancel button: 36 px tall
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
5. 5.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) red on green
6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 40 px tall
   Start button: 60 px tall
   Save button: 36 px tall
   Send button: 64 px tall
9. 9.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) red on green (d) white on dark green
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 36 px tall
    Send button: 48 px tall
    Next button: 32 px tall
15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Done button: 60 px tall
    Cancel button: 32 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Help button: 48 px tall
    Next button: 40 px tall
20. 20.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) pale pink on white
21. 21.True or false: grey text on grey is good button design. (a) True (b) False
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 32 px tall
    Next button: 52 px tall
    Help button: 40 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 60 px tall
    Back button: 52 px tall
    Save button: 32 px tall
25. 25.True or false: icons with no meaning is poor button design. (a) True (b) False
26. 26.True or false: a clear word like Save is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 48 px tall
    Next button: 28 px tall (a) Next (b) Cancel (c) Start
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Send button: 32 px tall
    Cancel button: 44 px tall
    Save button: 44 px tall
32. 32.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) red on green (d) dark blue on white
33. 33.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) light grey on white
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Done button: 52 px tall
    Send button: 48 px tall (a) Send (b) Done (c) Back
36. 36.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Done button: 48 px tall
    Save button: 48 px tall (a) Save (b) Done (c) Help
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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