App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 476 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 40 px tall
   Save button: 60 px tall
   Send button: 48 px tall
2. 2.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) white on black (d) pale pink on white
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Send button: 60 px tall
   Done button: 44 px tall
   Next button: 40 px tall
5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 64 px tall
   Send button: 36 px tall
   Save button: 60 px tall
   Done button: 36 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
10. 10.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) red on green
11. 11.True or false: buttons almost touching is good button design. (a) False (b) True
12. 12.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
13. 13.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) black on yellow (d) white on dark green
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
16. 16.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on pale grey (d) light grey on white
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
19. 19.True or false: a clear word like Save is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Done button: 52 px tall
    Next button: 48 px tall (a) Next (b) Save (c) Done
21. 21.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Start button: 32 px tall
    Save button: 32 px tall
    Done button: 56 px tall
23. 23.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on black (d) white on black
24. 24.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) black on pale grey
25. 25.True or false: grey text on grey is good button design. (a) True (b) False
26. 26.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on yellow (d) pale pink on white
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) white on black
28. 28.True or false: icons with no meaning is good button design. (a) True (b) False
29. 29.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.True or false: a big, easy tap area is good button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 56 px tall
    Start button: 48 px tall (a) Start (b) Done (c) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Next button: 56 px tall
    Help button: 56 px tall
    Start button: 36 px tall
38. 38.True or false: strong colour contrast is poor button design. (a) True (b) False
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
40. 40.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read

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