App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 156 · 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 this good or poor button design: space between buttons? (a) poor design (b) good design
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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on yellow (d) white on dark green
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.True or false: icons with no meaning is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
9. 9.True or false: buttons almost touching is good button design. (a) False (b) True
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Save button: 60 px tall
    Next button: 64 px tall
    Back button: 60 px tall (a) Next (b) Save (c) Send (d) Back
11. 11.True or false: space between buttons is poor button design. (a) True (b) False
12. 12.True or false: a tiny 20 px button is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 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?
    Send button: 48 px tall
    Done button: 48 px tall
    Next button: 52 px tall
    Help button: 52 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Start button: 64 px tall
    Help button: 44 px tall
    Next button: 36 px tall
16. 16.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) dark blue on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Next button: 72 px tall
    Cancel button: 64 px tall (a) Cancel (b) Next (c) Save
18. 18.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) light grey on white (d) pale pink on white
19. 19.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) dark blue on black (d) pale pink on white
20. 20.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) yellow on white
21. 21.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 48 px tall
    Next button: 72 px tall (a) Save (b) Next (c) Cancel
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.True or false: grey text on grey is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 48 px tall
    Back button: 40 px tall
    Start button: 44 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Send button: 44 px tall
    Save button: 40 px tall
    Start button: 36 px tall
27. 27.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
29. 29.True or false: space between buttons is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 48 px tall
    Back button: 32 px tall
    Help button: 36 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 28 px tall
    Back button: 72 px tall (a) Help (b) Cancel (c) Back
32. 32.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) red on green
33. 33.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 56 px tall
    Start button: 60 px tall
    Back button: 52 px tall
36. 36.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) pale pink on white
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 Back button is 44 px tall. How many px taller must it be?
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
40. 40.True or false: a big, easy tap area is poor button design. (a) False (b) True

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