App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 99 · 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) black on pale grey (b) white on dark green (c) dark blue on white (d) pale pink on white
2. 2.True or false: strong colour contrast is good button design. (a) False (b) True
3. 3.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) dark blue on white
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
8. 8.True or false: grey text on grey is good button design. (a) True (b) False
9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
11. 11.True or false: a tiny 20 px button is poor button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 72 px tall
    Done button: 64 px tall
    Save button: 52 px tall (a) Cancel (b) Send (c) Done (d) Save
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
15. 15.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) dark blue on black (d) pale pink on white
16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) white on black (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
19. 19.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.True or false: space between buttons is good button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 48 px tall
    Save button: 56 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Done button: 72 px tall
    Send button: 60 px tall
    Start button: 64 px tall (a) Cancel (b) Start (c) Send (d) Done
23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 52 px tall
    Back button: 56 px tall
    Help button: 32 px tall
25. 25.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Send button: 64 px tall
    Back button: 68 px tall (a) Send (b) Help (c) Back
29. 29.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on white (d) red on green
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 24 px tall
    Back button: 48 px tall (a) Back (b) Save (c) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Done button: 48 px tall
    Start button: 52 px tall
32. 32.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Save button: 48 px tall
    Done button: 64 px tall (a) Done (b) Save (c) Back
35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 36 px tall
    Send button: 52 px tall
    Done button: 40 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Start button: 56 px tall
    Cancel button: 56 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 52 px tall
    Next button: 48 px tall
    Send button: 52 px tall (a) Cancel (b) Next (c) Send (d) Save
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 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?
    Done button: 52 px tall
    Save button: 32 px tall
    Next button: 64 px tall
    Start button: 56 px tall

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