sRGB profiles

The sRGB v4 ICC preference profile is a v4 replacement for commonly used v2 sRGB profiles. It gives better results in workflows that implement the ICC v4 specification. It is intended to be used in combination with other ICC v4 profiles.

The advantages of the new profile are:

More pleasing results for most images when combined with any correctly-constructed v4 output profile using the perceptual rendering intent.
More consistently correct results among different CMMs using the ICC-absolute colorimetric rendering intent.
Higher color accuracy using the media-relative colorimetric intent.

A typical use case would be to print sRGB images captured with a digital still camera. In this case a user could open the image in Adobe® Photoshop®, assign the sRGB v4 profile as shown in Figure 1. Adobe® Photoshop® is either a registered trademark or trademark of Adobe Systems Incorporated in the United States and/or other countries.

Figure 1. Assigning the sRGB v4 ICC preference profile. Adobe product screen shot reprinted with permission from Adobe Systems Incorporated.

The user would then convert the data to printer specific values with the sRGB v4 profile as source, the v4 printer profile as destination, and selecting the perceptual rendering intent, as shown in Fig 2.

Figure 2. Conversion from sRGB v4 ICC preference profile to v4 printer profile in Photoshop using the perceptual rendering intent. Adobe product screen shot reprinted with permission from Adobe Systems Incorporated.

The three available rendering intents of the sRGB v4 profile should normally be used as follows:

The ICC-absolute colorimetric rendering intent should be used when the goal is to maintain the colors of the original on the reproduction,
The media-relative colorimetric intent should be used when the goal is to map the source medium white to the destination medium,
The perceptual intent should be used when the goal is to re-optimize the source colors for the reproduction medium while maintaining the "look" of the source image

The re-optimization performed by the perceptual rendering intent of the profile is a result of using the Perceptual Medium Reference Gamut defined in the ICC v4 specification as an intermediate rendering target. No perceptual reference medium is defined for v2 profiles.

Advice for caution

Ideally the ICC v4 profile should not be combined with ICC v2 profiles. If that is unavoidable, see the intermediate-level ICC White Paper 26 'Using the sRGB_v4_ICC_preference.icc profile' for additional information and recommendations.

The sRGB v4 profile will in some cases not produce the same results as would be obtained using an sRGB v2 profile. Differences will depend on the particular sRGB v2 profile and rendering intent used. See the intermediate level white paper for additional information and recommendations.

Summary Overall users can expect to get better and more consistent results using the sRGB v4 profile versus the sRGB v2 profiles. More details are available in White Paper 26.

Terms of use

To anyone who acknowledges that the file "sRGB_v4_ICC_preference.icc" is provided "AS IS" WITH NO EXPRESS OR IMPLIED WARRANTY, permission to use, copy and distribute this file for any purpose is hereby granted without fee, provided that the file is not changed including the ICC copyright notice tag, and that the name of ICC shall not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. ICC makes no representations about the suitability of this software for any purpose.

sRGB_v4_ICC_preference.icc

Feedback on the performance of the ICC sRGB Preference profile (whether positive or negative) would be greatly welcomed. Please send comments to ICC users (Subscribe to ICC users mailing list here.)

Display class version

The sRGB_v4_ICC_preference.icc profile is of the profile class 'colorspace'. While ICC recommends this version is used, some applications fail to recognize colorspace class profiles. A workaround for such cases is to use a 'display' class version (identical in all respects except for the profile class field in the header, and the profileID value). The display class version is subject to the same terms of use as the colorspace class version.

sRGB_v4_ICC_preference_displayclass.icc

sRGB v4 Appearance

This profile aims to preserve the appearance of the sRGB display when transformed to other colour spaces. More information is available here, together with a link to download the profile.

v2 profiles

An ICC v2 sRGB profile is provided below, with XYZ black point scaling to zero. This profile has the preferred rendering intent in the header set to 'perceptual'.

The profile contains the standard linearized Bradford D65 to D50 chromatic adaptation tag (this tag was often not present in older sRGB profiles), and the media white point tag is set to D50 (as is required for ICC v4 display profiles and recommended for v2 profiles). This avoids the inappropriate color casts that older sRGB v2 ICC profiles sometimes produced when the absolute colorimetric intent was used. This profile is subject to the general licensing terms for ICC profiles, which can be seen here.

sRGB2014.icc

NOTE: This profile was revised in February 2015 to bring the black point tag into alignment with current ISO and IEC recommendations. The previous version, which has a black point with greater luminance to reflect the viewing flare in practical use, is still available here.

iccMAX profiles

The iccMAX specification enables connection of colour encodings that are not based on the D50 PCS. Details and example profiles are available on the iccMAX sRGB profiles page.