App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 466 · 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 black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) dark blue on white (d) yellow on white
4. 4.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) red on green (d) white on black
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
6. 6.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
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.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Send button: 36 px tall
    Next button: 72 px tall
    Cancel button: 52 px tall (a) Next (b) Send (c) Cancel (d) Back
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
16. 16.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Done button: 52 px tall
    Save button: 32 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 64 px tall
    Start button: 28 px tall
    Send button: 64 px tall (a) Cancel (b) Send (c) Save (d) Start
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
20. 20.True or false: space between buttons is good button design. (a) False (b) True
21. 21.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
23. 23.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 28 px tall
    Start button: 60 px tall
    Cancel button: 48 px tall (a) Help (b) Cancel (c) Start (d) Send
25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.True or false: a clear word like Save is good button design. (a) False (b) True
29. 29.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) dark blue on white (d) black on pale grey
30. 30.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
32. 32.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on black (d) white on dark green
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?
    Next button: 28 px tall
    Send button: 72 px tall
    Start button: 52 px tall (a) Start (b) Send (c) Next
35. 35.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Send button: 24 px tall
    Cancel button: 56 px tall
    Save button: 48 px tall (a) Send (b) Save (c) Cancel (d) Done
37. 37.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Cancel button: 36 px tall
    Start button: 40 px tall
    Back button: 32 px tall
39. 39.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) light grey on white
40. 40.True or false: space between buttons is poor button design. (a) False (b) True

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