App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 521 · 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.True or false: space between buttons is good button design. (a) True (b) False
2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) light grey on white (d) red on green
4. 4.True or false: a clear word like Save is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 24 px tall
   Cancel button: 52 px tall
   Done button: 64 px tall
   Next button: 48 px tall (a) Next (b) Back (c) Done (d) Cancel
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Back button: 44 px tall
   Help button: 64 px tall
   Next button: 32 px tall
7. 7.True or false: space between buttons is poor button design. (a) False (b) True
8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🌗 Is red on green 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: a big, easy tap area? (a) good design (b) poor design
11. 11.True or false: strong colour contrast is good button design. (a) False (b) True
12. 12.True or false: grey text on grey is good button design. (a) True (b) False
13. 13.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) dark blue on white (d) white on black
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Done button: 48 px tall
    Next button: 72 px tall (a) Next (b) Done (c) Back
15. 15.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 36 px tall
    Cancel button: 32 px tall
    Done button: 60 px tall
20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) black on pale grey
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 32 px tall
    Help button: 56 px tall (a) Help (b) Send (c) Next
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 32 px tall
    Help button: 72 px tall
    Back button: 72 px tall (a) Start (b) Help (c) Next (d) Back
25. 25.True or false: a big, easy tap area is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Help button: 28 px tall
    Next button: 68 px tall (a) Back (b) Next (c) Help
27. 27.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) light grey on white (d) black on yellow
28. 28.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) dark blue on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 72 px tall
    Help button: 44 px tall (a) Help (b) Back (c) Next
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
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. Which button is too small?
    Cancel button: 64 px tall
    Next button: 68 px tall
    Help button: 32 px tall (a) Help (b) Cancel (c) Next
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 52 px tall
    Done button: 60 px tall
34. 34.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) black on yellow
35. 35.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on black (d) dark blue on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 36 px tall
    Help button: 36 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 40 px tall
    Start button: 56 px tall
    Cancel button: 36 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel 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?
    Done button: 52 px tall
    Start button: 64 px tall
    Help button: 44 px tall
40. 40.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on dark green (d) dark blue on black

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