App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 136 · 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) white on dark green (b) black on yellow (c) dark blue on black (d) black on pale grey
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
11. 11.True or false: a big, easy tap area is good button design. (a) False (b) True
12. 12.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) white on dark green
13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
14. 14.True or false: a tiny 20 px button is good button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 36 px tall
    Help button: 32 px tall
    Send button: 32 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Next button: 72 px tall
    Start button: 60 px tall (a) Cancel (b) Next (c) Start
17. 17.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
18. 18.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) red on green (d) white on black
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 40 px tall
    Done button: 68 px tall (a) Start (b) Done (c) Back
21. 21.True or false: grey text on grey is good button design. (a) False (b) True
22. 22.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) light grey on white (d) black on pale grey
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 48 px tall
    Save button: 52 px tall
    Start button: 56 px tall
24. 24.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) light grey on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
27. 27.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on black (d) dark blue on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Cancel button: 56 px tall
    Next button: 36 px tall
    Back button: 48 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 72 px tall
    Next button: 40 px tall (a) Save (b) Next (c) Cancel
32. 32.True or false: strong colour contrast is poor button design. (a) True (b) False
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
34. 34.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) black on yellow (d) black on pale grey
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Start button: 44 px tall
    Next button: 44 px tall
40. 40.True or false: icons with no meaning is poor button design. (a) True (b) False

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