App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 464 · 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.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
2. 2.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
3. 3.True or false: a tiny 20 px button is good button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
6. 6.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) dark blue on white (d) white on dark green
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 56 px tall
   Done button: 68 px tall
   Start button: 36 px tall (a) Save (b) Done (c) Start
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 64 px tall
   Next button: 68 px tall
   Cancel button: 44 px tall
   Start button: 64 px tall (a) Start (b) Next (c) Back (d) Cancel
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Start button: 44 px tall
    Cancel button: 64 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Done button: 48 px tall
    Next button: 28 px tall
    Send button: 52 px tall (a) Send (b) Next (c) Done (d) Save
13. 13.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) dark blue on black
14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
15. 15.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) light grey on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 44 px tall
    Back button: 64 px tall
21. 21.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) light grey on white
22. 22.True or false: buttons almost touching is good button design. (a) False (b) True
23. 23.True or false: a tiny 20 px button is poor button design. (a) True (b) False
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Cancel button: 68 px tall
    Start button: 44 px tall (a) Start (b) Done (c) Cancel
27. 27.True or false: strong colour contrast 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: 64 px tall
    Cancel button: 36 px tall
    Help button: 56 px tall (a) Cancel (b) Start (c) Help
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Cancel button: 60 px tall
    Help button: 48 px tall (a) Done (b) Help (c) Cancel
31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.True or false: icons with no meaning is poor button design. (a) True (b) False
34. 34.True or false: a big, easy tap area is good button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 60 px tall
    Next button: 64 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Next button: 36 px tall
    Send button: 52 px tall
    Help button: 56 px tall (a) Help (b) Start (c) Send (d) Next
39. 39.True or false: grey text on grey is poor button design. (a) True (b) False
40. 40.Which colour pair is hard to read? (a) yellow on white (b) white on black (c) black on pale grey (d) white on dark green

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