App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 128 · 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 easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on dark green
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
5. 5.True or false: buttons almost touching is good button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) white on black
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.True or false: strong colour contrast is poor button design. (a) False (b) True
10. 10.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) pale pink on white
11. 11.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) pale pink on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
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. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 60 px tall
    Next button: 40 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 32 px tall
    Help button: 44 px tall
    Start button: 52 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 32 px tall
    Help button: 44 px tall
19. 19.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is light grey on white 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. Which button is too small?
    Done button: 60 px tall
    Help button: 72 px tall
    Save button: 60 px tall
    Cancel button: 40 px tall (a) Done (b) Save (c) Cancel (d) Help
22. 22.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) black on pale grey (d) dark blue on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Done button: 28 px tall
    Cancel button: 60 px tall (a) Done (b) Cancel (c) Send
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) light grey on white (d) white on black
26. 26.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
27. 27.True or false: a big, easy tap area is poor button design. (a) False (b) True
28. 28.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) red on green
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 52 px tall
    Back button: 48 px tall
31. 31.True or false: space between buttons is poor button design. (a) True (b) False
32. 32.True or false: a big, easy tap area is good button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 48 px tall
    Cancel button: 24 px tall (a) Cancel (b) Back (c) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
35. 35.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 32 px tall
    Start button: 44 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 44 px tall
    Save button: 52 px tall (a) Send (b) Save (c) Start
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 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?
    Back button: 56 px tall
    Save button: 36 px tall
    Cancel button: 72 px tall (a) Back (b) Cancel (c) Save
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?

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