App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 587 · 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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
5. 5.True or false: icons with no meaning is poor button design. (a) False (b) True
6. 6.True or false: strong colour contrast is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
12. 12.True or false: a tiny 20 px button is good button design. (a) True (b) False
13. 13.True or false: strong colour contrast is good button design. (a) True (b) False
14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
16. 16.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) dark blue on black (d) pale pink on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Cancel button: 52 px tall
    Next button: 68 px tall
    Save button: 60 px tall (a) Start (b) Save (c) Next (d) Cancel
18. 18.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) dark blue on black
19. 19.True or false: buttons almost touching is good button design. (a) True (b) False
20. 20.True or false: space between buttons is poor button design. (a) True (b) False
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
22. 22.True or false: grey text on grey is poor button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 32 px tall
    Help button: 40 px tall
24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Done button: 56 px tall
    Cancel button: 48 px tall
    Help button: 56 px tall (a) Done (b) Cancel (c) Help (d) Send
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 32 px tall
    Help button: 56 px tall (a) Cancel (b) Help (c) Send
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Start button: 44 px tall
    Next button: 48 px tall (a) Start (b) Next (c) Help
29. 29.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) red on green (d) yellow on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
32. 32.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) yellow on white (d) white on black
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 28 px tall
    Cancel button: 68 px tall
    Done button: 60 px tall (a) Save (b) Done (c) Help (d) Cancel
35. 35.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) red on green
36. 36.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) dark blue on white (d) pale pink on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
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?
    Start button: 72 px tall
    Cancel button: 72 px tall
    Next button: 60 px tall
    Done button: 44 px tall (a) Next (b) Start (c) Cancel (d) Done
40. 40.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design

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