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- In this movie, we'll take a look

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at the Spectrum Ramp,

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which is this guy right here.

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It resides at the bottom
of the Color Panel.

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And what it allows you to do

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is quickly lift a color.

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So, for example, if you
want a shade of blue,

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you could just drop your cursor down

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into the Spectrum Ramp

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and then click on a
shade of blue, like so.

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And that'll just go ahead
and lift those values

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and then you can make any modifications

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that you like.

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Now, you're not gonna get
that much of a selection

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when the ramp is this tiny.

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And so if you think you're
gonna use it very often,

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you may wanna drag down on the bottom

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of the Color Panel like so

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in order to increase
the size of that ramp.

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And that way, as you click
and drag inside the ramp,

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you're gonna see pretty minute changes

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to, in my case, the hue
and saturation values.

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Now, notice if you hover
your cursor over this area,

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it's gonna read HSB spectrum,

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assuming that you're
seeing the HSB sliders.

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If you click on the fly-out menu icon

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and switch to RGB,

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you're not gonna see any
difference whatsoever

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in the colors,

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but when you hover your cursor

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you'll see the Tool Tip RGB Spectrum.

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And so if you wanna switch
to the CMYK Spectrum

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just go ahead and choose CMYK instead.

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At which point you will
see a big difference,

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because the CMYK spectrum

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is so much more muted.

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Now, the thing is, if
you wanted to map out

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all of the colors that
are available to you

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here inside Illustrator,

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then you would have to create

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some kind of 3D map.

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Because consider, for example,

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if we're working with HSB,

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I can go ahead and show all
the colors around a wheel,

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and just to jog your memory,

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I'm going to go ahead and switch back

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to artboard 2 inside of
this document right here.

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So we can show all the colors

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wrapping around the circle,

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and we can show the
reduced saturation values

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toward the center.

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But if I wanted to show the different

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brightness variations,

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then I would have to turn this circle

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essentially into a cylinder,

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where black was at the bottom

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and white was at the top.

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And so when we're looking at this

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2D representation right here,

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there's just no way that Illustrator

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can show us all the colors.

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So here's what it does.

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Regardless of whether you're looking at

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the RGB, the HSB or CMYK spectrum,

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you're seeing the hue
values mapped horizontally

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across this ramp,

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starting with red over here on the left

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and then we have orange, yellow, green,

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cyan, blue, and so on.

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Meanwhile, at the bottom of the spectrum,

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the saturation value is 100%,

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and the brightness value is zero.

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Then we go up to the middle of the chart,

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at which point the
saturation is still 100%,

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and now the brightness value
has risen to 100% as well.

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So in other words, the
colors are remaining

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highly saturated down here
at the bottom of the chart,

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but they're becoming increasingly brighter

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toward the middle.

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Then, once we cross the middle,

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the brightness stays 100%
all the way to the top

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and the saturation value eventually

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drops down to 0%.

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So let's say we want to
lift a shade of brown.

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I would go ahead and click down here

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in the dark oranges.

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So orange and brown
share a common hue value.

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And so notice, if I click
down here at this location,

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and you can click and hold

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in order to see the
values update on the fly,

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I just wanna make sure
you're aware of that.

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But at some point I'm going to reach

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a hue value of 30°, let's say.

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The saturation value will be 100%,

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and the brightness value

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I could get it if I tried hard enough

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to come in at around 50%.

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But let's say I don't want
a highly-saturated brown.

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Instead, I wanna reduce
that saturation value

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in order to achieve more
of a kind of muddy brown.

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This color right here

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that has a reduced saturation value

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and a reduced brightness value

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is not found anywhere
inside of this spectrum.

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And so what's missing are all the colors

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that have both saturation
and brightness values

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of 90% or less,

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which accounts for theoretically 98%

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of the colors you can
define in Illustrator.

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So, for example, let's
say we want a pastel blue.

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Well, if I click up here
in this bright area,

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you can see that the saturation value has

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dropped down a little bit,

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but the brightness value is 100%

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and it's gonna remain 100%

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as soon as we cross that
threshold right there,

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it's gonna remain at 100% all the way up

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as you're seeing right there.

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So if I want a shade of blue

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that's a little bit dark

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and it's a little bit desaturated as well,

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then I'm going to have to
adjust those values manually

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using the saturation and
brightness slider bars.

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So in other words, this Spectrum Ramp

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is a really great way
to lift a base color,

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but I don't want you to think
that you're gonna have access

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to every color you can
create inside Illustrator

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because, in fact, what we see here

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are only about 2% of the colors.

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If you want to get to the other 98%,

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then you're gonna have to

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manually modify the slider bars

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whether you're working with the HSB,

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RGB, or CMYK color model.

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And those are both the strengths

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and the weaknesses of the Spectrum Ramp

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located here at the
bottom of the Color Panel.