App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 240 · 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: 44 px tall
   Send button: 36 px tall
   Back button: 32 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
3. 3.True or false: strong colour contrast is poor button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
5. 5.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on dark green (d) yellow on white
6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 64 px tall
   Next button: 40 px tall
   Save button: 68 px tall (a) Next (b) Save (c) Send
8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) light grey on white (d) black on yellow
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Next button: 32 px tall
    Back button: 36 px tall
11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
13. 13.True or false: buttons almost touching is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 68 px tall
    Cancel button: 48 px tall (a) Help (b) Cancel (c) Save
15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 32 px tall
    Next button: 68 px tall (a) Next (b) Send (c) Help
17. 17.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) light grey on white (d) pale pink on white
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) yellow on white (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 64 px tall
    Help button: 64 px tall
    Start button: 24 px tall (a) Next (b) Start (c) Help (d) Cancel
21. 21.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Send button: 48 px tall
    Cancel button: 68 px tall (a) Send (b) Next (c) Cancel
23. 23.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) light grey on white
24. 24.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) red on green (d) dark blue on white
25. 25.True or false: icons with no meaning is good button design. (a) False (b) True
26. 26.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) pale pink on white
27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.True or false: icons with no meaning is poor button design. (a) True (b) False
29. 29.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) dark blue on white
30. 30.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 64 px tall
    Start button: 44 px tall
32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
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: icons with no meaning? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
38. 38.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
39. 39.True or false: strong colour contrast is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Back button: 64 px tall
    Send button: 52 px tall

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