App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 561 · 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?
   Next button: 48 px tall
   Cancel button: 32 px tall
   Start button: 36 px tall
   Back button: 40 px tall
2. 2.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) dark blue on black
3. 3.True or false: strong colour contrast is poor button design. (a) True (b) False
4. 4.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) black on yellow
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: a big, easy tap area is poor button design. (a) True (b) False
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 28 px tall
   Help button: 52 px tall
   Send button: 68 px tall
   Done button: 52 px tall (a) Help (b) Done (c) Send (d) Cancel
10. 10.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on pale grey (d) light grey on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Back button: 72 px tall
    Save button: 68 px tall
    Cancel button: 64 px tall (a) Help (b) Cancel (c) Back (d) Save
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Save button: 60 px tall
    Cancel button: 52 px tall (a) Save (b) Back (c) Cancel
15. 15.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 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
    Start button: 44 px tall
17. 17.True or false: a clear word like Save is poor button design. (a) False (b) True
18. 18.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) yellow on white
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Save button: 56 px tall
    Start button: 56 px tall
    Cancel button: 68 px tall (a) Cancel (b) Start (c) Done (d) Save
21. 21.True or false: icons with no meaning is good button design. (a) False (b) True
22. 22.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) black on pale grey (d) white on dark green
24. 24.True or false: grey text on grey is poor 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?
    Back button: 56 px tall
    Save button: 64 px tall
    Cancel button: 32 px tall
26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
27. 27.True or false: space between buttons is poor button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Save button: 52 px tall
    Cancel button: 24 px tall (a) Save (b) Start (c) Cancel
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 52 px tall
    Done button: 32 px tall
30. 30.True or false: a tiny 20 px button is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 44 px tall
    Help button: 32 px tall
    Cancel button: 64 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) dark blue on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?

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