#668708

sRGB · 102 / 135 / 8

#668708 belongs to the yellow-green family. Its hex code tells a screen to mix 102 red, 135 green and 8 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 75.6° lands in the yellow-green region. Its 88.8% saturation makes it strong in color at this lightness. HSL lightness is 28.0% on a scale from black (0%) to white (100%). Of black and white lettering, black has the clearer light-to-dark separation on this background (5.03:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 102, 135, 8
HSL: 75.59°, 88.81%, 28.04%
HSV / HSB: 75.59°, 94.07%, 52.94%
CMYK (approx.): 24.44%, 0.00%, 94.07%, 47.06%
CIE XYZ (D65, Y = 100 for white): 14.187, 20.170, 3.376
CIELAB (D65, 2° observer): 52.029, -27.999, 54.467
WCAG relative luminance: 0.20170
24-bit decimal: 6719240

CMYK uses a profile-free approximation. Printed output depends on the press, ink and paper. Lab uses a D65 white point.

Text contrast

Contrast tells you how clearly lettering separates from #668708 in light and dark. The ratio compares relative luminance, a measure of light weighted for human vision. Identical colors give 1:1 and black against white gives 21:1. A ratio of 2.99:1 falls just below the 3:1 AA minimum for large text. Body text needs at least 4.5:1 because its finer strokes are harder to distinguish.

Black text · 5.03:1

Normal text: AA
Large text: AAA

White text · 4.17:1

Normal text: Fail
Large text: AA

AA and AAA are WCAG accessibility levels. AAA sets a higher bar: 7:1 for normal text and 4.5:1 for large text. Large text begins at 18 pt regular or 14 pt bold. Ratings use the unrounded ratio. WCAG text contrast guidance

Palettes & scales

Harmonies rotate the hue. Scales mix the starting color with white, black or middle gray in 20% steps in encoded sRGB.

Complementary

#290887 sits half a turn (180°) from #668708 on the HSL wheel. Keeping saturation and lightness steady while crossing to the opposite hue gives you a contrasting accent. Check text contrast separately before using the pair for lettering.

#668708 #290887

Analogous

#876808 and #278708 sit 30° to either side of #668708. The three hues are neighbors on the wheel, so you can change the color of a border or highlight while keeping it close to the original.

#876808 #668708 #278708

Triadic

#668708, #086687 and #870866 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#668708 #086687 #870866

Split complementary

Start at #668708 and look across the wheel. #082787 and #680887 sit 30° to either side of its exact opposite, giving you two different accent choices.

#668708 #082787 #680887

Square

Starting with #668708, each quarter turn (90°) takes you to the next hue: #088768, #290887, then #870827. Across the square, #668708 pairs with #290887, and #088768 with #870827.

#668708 #088768 #290887 #870827

Tetradic

#668708 and #290887 are opposites, as are #088729 and #870866. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#668708 #088729 #290887 #870866

Tints

Mixing #668708 with white in 20% steps produces this scale. The first mixture, #859F39, keeps 80% of the original. By #E0E7CE, the mixture is 80% white.

#668708 #859F39 #A3B76B #C2CF9C #E0E7CE #FFFFFF

Shades

Mixing #668708 with black in 20% steps produces this scale. The first mixture, #526C06, keeps 80% of the original. By #141B02, the mixture is 80% black.

#668708 #526C06 #3D5105 #293603 #141B02 #000000

Tones

Mixing #668708 with middle gray in 20% steps produces this scale. The first mixture, #6B8620, keeps 80% of the original. By #7B8168, the mixture is 80% middle gray.

#668708 #6B8620 #708438 #768350 #7B8168 #808080

Copy color codes

Hex, RGB and HSL are three ways to write this screen color. Paste any of them into a CSS color property.

Hex

#668708

RGB

rgb(102 135 8)

HSL

hsl(75.591 88.811% 28.039%)

CSS example

.color-sample {
  background-color: #668708;
  color: #000000;
}

Channel breakdown

RGB

#668708 uses 102 red, 135 green and 8 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 40.0%

Green 52.9%

Blue 3.1%

CMYK

A simple CMYK estimate for #668708 is 24.4% cyan, 0.0% magenta, 94.1% yellow and 47.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 24.4%

Magenta 0.0%

Yellow 94.1%

Black 47.1%

Nearby colors

The nearest shorthand match is #668800. Its matching digit pairs let you write it as #680 in CSS. For a modern design, keep #668708 when you want an exact match. Use its web-safe neighbor, #669900, when matching a legacy palette of 216 colors.

Nearest shorthand · #668800 Nearest web-safe · #669900

Gradient to complement

#668708 #5C721D #525D32 #484848 #3D325D #331D72 #290887

Color vision previews

Compare how #668708 appears in each simulation. When two chart lines or status indicators become hard to tell apart, a label, shape or line pattern gives readers another way to distinguish them. Individual perception varies.

Protanopia

A red–green color vision deficiency. Without a distinct response from long-wavelength cones, some reds and greens can look alike, and reds can appear darker.

#8F7D00

Deuteranopia

A red–green color vision deficiency. Without a distinct response from medium-wavelength cones, some greens can be difficult to distinguish from reds or browns.

#8B7C1B

Tritanopia

A blue–yellow color vision deficiency. Without a distinct response from short-wavelength cones, blue can resemble green, and yellow can resemble pink.

#6B8072

Protanomaly (50%)

An altered long-wavelength cone response can make reds appear dimmer and harder to distinguish from greens. This swatch shows the model’s halfway setting.

#838000

Deuteranomaly (50%)

An altered medium-wavelength cone response can reduce the visible difference between reds and greens. This swatch shows the model’s halfway setting.

#817F15

Tritanomaly (50%)

An altered short-wavelength cone response can make blue harder to distinguish from green. This swatch shows the model’s halfway setting.

#698447

Grayscale (luminance)

This design check removes hue and preserves relative luminance so you can compare light and dark areas.

#7C7C7C

Partial grayscale (50% blend)

This design check mixes the original color halfway toward its grayscale equivalent in linear light. Use it to see how a design holds up as color fades.

#72825A

Technical reference

CAM16 and CIECAM02 below assume D65 white, an average surround, background Y of 20 against white at 100, and adapting luminance of 4.07 cd/m².

Linear sRGB

These channels scale with emitted light. Use them for lighting calculations and physically meaningful blends.

R 0.13287 G 0.24228 B 0.00243

Display P3

P3 displays can reproduce a wider range of reds and greens. These coordinates reproduce this same sRGB swatch on a color-managed P3 display.

R 0.42662 G 0.52575 B 0.16016

Linear Display P3

These P3 channels are proportional to light, before display encoding.

R 0.15229 G 0.23865 B 0.02202

CIE xyY

The x and y coordinates locate chromaticity on a diagram. Y gives relative luminance on a scale where white is 100.

x 0.376 y 0.535 Y 20.170

CMY

Ideal cyan, magenta and yellow are the complements of the encoded red, green and blue channels.

C % 60.000 M % 47.059 Y % 96.863

Binary RGB

Each eight-bit group represents one channel. Together they store the 24-bit hex color.

01100110 10000111 00001000