App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 594 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
5. 5.True or false: a big, easy tap area is poor button design. (a) True (b) False
6. 6.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) pale pink on white
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.True or false: a clear word like Save is good button design. (a) False (b) True
12. 12.True or false: grey text on grey is poor button design. (a) True (b) False
13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.True or false: grey text on grey is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) white on black (b) red on green (c) dark blue on black (d) light grey on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Next button: 56 px tall
    Cancel button: 64 px tall (a) Save (b) Cancel (c) Next
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 48 px tall
    Next button: 52 px tall
    Done button: 44 px tall (a) Start (b) Next (c) Done (d) Cancel
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Save button: 52 px tall
    Send button: 60 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Next button: 52 px tall
    Send button: 44 px tall (a) Send (b) Next (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 52 px tall
    Done button: 36 px tall (a) Help (b) Cancel (c) Done
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 32 px tall
    Done button: 44 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 60 px tall
    Done button: 36 px tall
    Help button: 32 px tall
28. 28.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) black on yellow
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 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?
    Help button: 52 px tall
    Back button: 36 px tall
    Send button: 52 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
33. 33.🌗 Is red on green 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. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 40 px tall
    Done button: 32 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
36. 36.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) black on yellow
37. 37.True or false: a tiny 20 px button is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Done button: 44 px tall
    Back button: 36 px tall
    Start button: 48 px tall
39. 39.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) pale pink on white (d) white on black
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 40 px tall
    Start button: 60 px tall

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