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  1. Web
  2. CSS
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  4. Values
  5. <filter-function>
  6. grayscale()
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grayscale() CSS function

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2016.

The grayscale() CSS function converts the input image to grayscale. Its result is a <filter-function>.

In this article

Try it

filter: grayscale(0);
filter: grayscale(0.2);
filter: grayscale(60%);
filter: grayscale(1);
<section id="default-example"> <img class="transition-all" id="example-element" src="/shared-assets/images/examples/firefox-logo.svg" width="200" /> </section>

Syntax

css
grayscale(amount)

Parameters

amount Optional

Amount of the input image that is converted to grayscale. It is specified as a <number> or a <percentage>. A value of 100% changes the input completely to grayscale, while a value of 0% leaves the input unchanged. Values between 0% and 100% have linear multipliers on the effect. The initial value used for interpolation is 0. The default value is 1.

Formal syntax

<grayscale()> =
grayscale( [ <number> | <percentage> ]? )
This syntax reflects the latest standard as per Filter Effects Module Level 1. Not all browsers may have implemented every part. See Browser compatibility for support information.

Examples

Examples of correct values for grayscale()

css
grayscale(0) /* No effect */ grayscale(.7) /* 70% grayscale */ grayscale() /* Completely grayscale */ grayscale(1) grayscale(100%)

Specifications

Specification
Filter Effects Module Level 1
# funcdef-filter-grayscale

Browser compatibility

Enable JavaScript to view this browser compatibility table.

See also

The other <filter-function> functions available to be used in values of the filter and backdrop-filter properties include:

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  52. Selectors
    1. & nesting selector
    2. Attribute selectors
    3. Class selectors
    4. ID selectors
    5. Keyframe selectors
    6. Namespace separator
    7. Selector list
    8. Type selectors
    9. Universal selectors
  53. Combinators
    1. Child combinator
    2. Column combinator
    3. Descendant combinator
    4. Next-sibling combinator
    5. Subsequent-sibling combinator
  54. Pseudo-classes
    1. :-moz-*
      1. :-moz-broken
      2. :-moz-drag-over
      3. :-moz-first-node
      4. :-moz-handler-blocked
      5. :-moz-handler-crashed
      6. :-moz-handler-disabled
      7. :-moz-last-node
      8. :-moz-loading
      9. :-moz-locale-dir(ltr)
      10. :-moz-locale-dir(rtl)
      11. :-moz-only-whitespace
      12. :-moz-submit-invalid
      13. :-moz-suppressed
      14. :-moz-user-disabled
      15. :-moz-window-inactive
    2. :active-view-transition
    3. :active-view-transition-type()
    4. :active
    5. :any-link
    6. :autofill
    7. :blank
    8. :buffering
    9. :checked
    10. :current
    11. :default
    12. :defined
    13. :dir()
    14. :disabled
    15. :empty
    16. :enabled
    17. :first-child
    18. :first-of-type
    19. :first
    20. :focus-visible
    21. :focus-within
    22. :focus
    23. :fullscreen
    24. :future
    25. :has-slotted
    26. :has()
    27. :heading
    28. :heading()
    29. :host-context()
    30. :host
    31. :host()
    32. :hover
    33. :in-range
    34. :indeterminate
    35. :interest-source
    36. :interest-target
    37. :invalid
    38. :is()
    39. :lang()
    40. :last-child
    41. :last-of-type
    42. :left
    43. :link
    44. :local-link
    45. :modal
    46. :muted
    47. :not()
    48. :nth-*
      1. :nth-child()
      2. :nth-last-child()
      3. :nth-last-of-type()
      4. :nth-of-type()
    49. :only-child
    50. :only-of-type
    51. :open
    52. :optional
    53. :out-of-range
    54. :past
    55. :paused
    56. :picture-in-picture
    57. :placeholder-shown
    58. :playing
    59. :popover-open
    60. :read-only
    61. :read-write
    62. :required
    63. :right
    64. :root
    65. :scope
    66. :seeking
    67. :stalled
    68. :state()
    69. :target-*
      1. :target-after
      2. :target-before
      3. :target-current
    70. :target
    71. :user-invalid
    72. :user-valid
    73. :valid
    74. :visited
    75. :volume-locked
    76. :where()
    77. :xr-overlay
  55. Pseudo-elements
    1. ::-moz-*
      1. ::-moz-color-swatch
      2. ::-moz-focus-inner
      3. ::-moz-list-bullet
      4. ::-moz-list-number
      5. ::-moz-meter-bar
      6. ::-moz-progress-bar
      7. ::-moz-range-progress
      8. ::-moz-range-thumb
      9. ::-moz-range-track
    2. ::-webkit-*
      1. ::-webkit-inner-spin-button
      2. ::-webkit-meter-bar
      3. ::-webkit-meter-even-less-good-value
      4. ::-webkit-meter-inner-element
      5. ::-webkit-meter-optimum-value
      6. ::-webkit-meter-suboptimum-value
      7. ::-webkit-progress-bar
      8. ::-webkit-progress-inner-element
      9. ::-webkit-progress-value
      10. ::-webkit-scrollbar
      11. ::-webkit-search-cancel-button
      12. ::-webkit-search-results-button
      13. ::-webkit-slider-runnable-track
      14. ::-webkit-slider-thumb
    3. ::after
    4. ::backdrop
    5. ::before
    6. ::checkmark
    7. ::column
    8. ::cue
    9. ::details-content
    10. ::file-selector-button
    11. ::first-letter
    12. ::first-line
    13. ::grammar-error
    14. ::highlight()
    15. ::marker
    16. ::part()
    17. ::picker-icon
    18. ::picker()
    19. ::placeholder
    20. ::scroll-*
      1. ::scroll-button()
      2. ::scroll-marker
      3. ::scroll-marker-group
    21. ::search-text
    22. ::selection
    23. ::slotted()
    24. ::spelling-error
    25. ::target-text
    26. ::view-*
      1. ::view-transition
      2. ::view-transition-group()
      3. ::view-transition-image-pair()
      4. ::view-transition-new()
      5. ::view-transition-old()
  56. At-rules
    1. @charset
    2. @color-profile
    3. @container
    4. @counter-style
    5. @custom-media
    6. @document
    7. @font-face
    8. @font-feature-values
    9. @font-palette-values
    10. @function
    11. @import
    12. @keyframes
    13. @layer
    14. @media
    15. @namespace
    16. @page
    17. @position-try
    18. @property
    19. @scope
    20. @starting-style
    21. @supports
    22. @view-transition
  57. Values
    1. !important
    2. fit-content
    3. inherit
    4. initial
    5. max-content
    6. min-content
    7. revert
    8. revert-layer
    9. revert-rule
    10. unset
  58. Types
    1. <absolute-size>
    2. <alpha-value>
    3. <angle-percentage>
    4. <angle>
    5. <axis>
    6. <baseline-position>
    7. <basic-shape>
    8. <blend-mode>
    9. <box-edge>
    10. <calc-keyword>
    11. <calc-sum>
    12. <color-interpolation-method>
    13. <color>
    14. <content-distribution>
    15. <content-position>
    16. <corner-shape-value>
    17. <custom-ident>
    18. <dashed-function>
    19. <dashed-ident>
    20. <dimension>
    21. <display-box>
    22. <display-inside>
    23. <display-internal>
    24. <display-legacy>
    25. <display-listitem>
    26. <display-outside>
    27. <easing-function>
    28. <filter-function>
    29. <flex>
    30. <frequency-percentage>
    31. <frequency>
    32. <generic-family>
    33. <gradient>
    34. <hex-color>
    35. <hue-interpolation-method>
    36. <hue>
    37. <ident>
    38. <image>
    39. <integer>
    40. <length-percentage>
    41. <length>
    42. <line-style>
    43. <named-color>
    44. <number>
    45. <overflow-position>
    46. <overflow>
    47. <percentage>
    48. <position-area>
    49. <position>
    50. <ratio>
    51. <relative-size>
    52. <resolution>
    53. <rule-list>
    54. <self-position>
    55. <shape>
    56. <string>
    57. <system-color>
    58. <text-edge>
    59. <time-percentage>
    60. <time>
    61. <timeline-range-name>
    62. <transform-function>
    63. <url>
  59. Functions
    1. -moz-image-rect()
    2. abs()
    3. acos()
    4. anchor-size()
    5. anchor()
    6. asin()
    7. atan()
    8. atan2()
    9. attr()
    10. blur()
    11. brightness()
    12. calc-size()
    13. calc()
    14. circle()
    15. clamp()
    16. color-mix()
    17. color()
    18. conic-gradient()
    19. contrast-color()
    20. contrast()
    21. cos()
    22. counter()
    23. counters()
    24. cross-fade()
    25. cubic-bezier()
    26. device-cmyk()
    27. drop-shadow()
    28. dynamic-range-limit-mix()
    29. element()
    30. ellipse()
    31. env()
    32. exp()
    33. fit-content()
    34. grayscale()
    35. hsl()
    36. hue-rotate()
    37. hwb()
    38. hypot()
    39. if()
    40. image-set()
    41. image()
    42. inset()
    43. invert()
    44. lab()
    45. lch()
    46. light-dark()
    47. linear-gradient()
    48. linear()
    49. log()
    50. matrix()
    51. matrix3d()
    52. max()
    53. min()
    54. minmax()
    55. mod()
    56. oklab()
    57. oklch()
    58. opacity()
    59. paint()
    60. path()
    61. perspective()
    62. polygon()
    63. pow()
    64. progress()
    65. radial-gradient()
    66. random()
    67. ray()
    68. rect()
    69. rem()
    70. repeat()
    71. repeating-conic-gradient()
    72. repeating-linear-gradient()
    73. repeating-radial-gradient()
    74. rgb()
    75. rotate()
    76. rotate3d()
    77. rotateX()
    78. rotateY()
    79. rotateZ()
    80. round()
    81. saturate()
    82. scale()
    83. scale3d()
    84. scaleX()
    85. scaleY()
    86. scaleZ()
    87. sepia()
    88. shape()
    89. sibling-count()
    90. sibling-index()
    91. sign()
    92. sin()
    93. skew()
    94. skewX()
    95. skewY()
    96. sqrt()
    97. steps()
    98. superellipse()
    99. symbols()
    100. tan()
    101. translate()
    102. translate3d()
    103. translateX()
    104. translateY()
    105. translateZ()
    106. type()
    107. url()
    108. var()
    109. xywh()

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