App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 177 · 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. The Start button is 40 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
3. 3.True or false: space between buttons is poor button design. (a) True (b) False
4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) black on pale grey (d) white on black
6. 6.True or false: buttons almost touching is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Send button: 60 px tall
   Start button: 64 px tall
   Back button: 28 px tall (a) Start (b) Next (c) Send (d) Back
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 36 px tall
   Done button: 36 px tall
   Save button: 64 px tall
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) yellow on white (d) red on green
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Help button: 40 px tall
    Cancel button: 64 px tall
    Done button: 60 px tall (a) Next (b) Cancel (c) Help (d) Done
12. 12.True or false: grey text on grey is good button design. (a) False (b) True
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 28 px tall
    Help button: 64 px tall (a) Send (b) Cancel (c) Help
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Next button: 52 px tall
    Send button: 60 px tall
17. 17.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) black on yellow
18. 18.True or false: a tiny 20 px button is good button design. (a) True (b) False
19. 19.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) dark blue on black
20. 20.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) light grey on white (d) black on yellow
21. 21.True or false: buttons almost touching is good button design. (a) False (b) True
22. 22.🌗 Is white on dark green 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. The Save button is 28 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 44 px tall
    Save button: 64 px tall (a) Save (b) Start (c) Done
25. 25.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
26. 26.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) red on green
27. 27.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: space between buttons is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Done button: 48 px tall
    Back button: 48 px tall
31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
34. 34.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
35. 35.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Save button: 64 px tall
    Done button: 60 px tall
    Help button: 72 px tall (a) Save (b) Done (c) Back (d) Help
38. 38.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on black (d) black on pale grey
39. 39.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) pale pink on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 48 px tall
    Save button: 48 px tall
    Next button: 64 px tall

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