#178C19

sRGB · 23 / 140 / 25

#178C19 belongs to the green family. Its hex code tells a screen to mix 23 red, 140 green and 25 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 121.0° lands in the green region. Its 71.8% saturation makes it strong in color at this lightness. HSL lightness is 32.0% 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 (4.80:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 23, 140, 25
HSL: 121.03°, 71.78%, 31.96%
HSV / HSB: 121.03°, 83.57%, 54.90%
CMYK (approx.): 83.57%, 0.00%, 82.14%, 45.10%
CIE XYZ (D65, Y = 100 for white): 9.906, 19.008, 4.066
CIELAB (D65, 2° observer): 50.696, -52.178, 48.146
WCAG relative luminance: 0.19009
24-bit decimal: 1543193

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 #178C19 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 · 4.80:1

Normal text: AA
Large text: AAA

White text · 4.37:1

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

#8C178A sits half a turn (180°) from #178C19 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.

#178C19 #8C178A

Analogous

#508C17 and #178C53 sit 30° to either side of #178C19. 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.

#508C17 #178C19 #178C53

Triadic

#178C19, #19178C and #8C1917 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#178C19 #19178C #8C1917

Split complementary

Start at #178C19 and look across the wheel. #53178C and #8C1750 sit 30° to either side of its exact opposite, giving you two different accent choices.

#178C19 #53178C #8C1750

Square

Starting with #178C19, each quarter turn (90°) takes you to the next hue: #17508C, #8C178A, then #8C5317. Across the square, #178C19 pairs with #8C178A, and #17508C with #8C5317.

#178C19 #17508C #8C178A #8C5317

Tetradic

#178C19 and #8C178A are opposites, as are #178A8C and #8C1917. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#178C19 #178A8C #8C178A #8C1917

Tints

Mixing #178C19 with white in 20% steps produces this scale. The first mixture, #45A347, keeps 80% of the original. By #D1E8D1, the mixture is 80% white.

#178C19 #45A347 #74BA75 #A2D1A3 #D1E8D1 #FFFFFF

Shades

Mixing #178C19 with black in 20% steps produces this scale. The first mixture, #127014, keeps 80% of the original. By #051C05, the mixture is 80% black.

#178C19 #127014 #0E540F #09380A #051C05 #000000

Tones

Mixing #178C19 with middle gray in 20% steps produces this scale. The first mixture, #2C8A2E, keeps 80% of the original. By #6B826B, the mixture is 80% middle gray.

#178C19 #2C8A2E #418742 #568557 #6B826B #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

#178C19

RGB

rgb(23 140 25)

HSL

hsl(121.026 71.779% 31.961%)

CSS example

.color-sample {
  background-color: #178C19;
  color: #000000;
}

Channel breakdown

RGB

#178C19 uses 23 red, 140 green and 25 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 9.0%

Green 54.9%

Blue 9.8%

CMYK

A simple CMYK estimate for #178C19 is 83.6% cyan, 0.0% magenta, 82.1% yellow and 45.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 83.6%

Magenta 0.0%

Yellow 82.1%

Black 45.1%

Nearby colors

The nearest shorthand match is #118811. Its matching digit pairs let you write it as #181 in CSS. For a modern design, keep #178C19 when you want an exact match. Use its web-safe neighbor, #009900, when matching a legacy palette of 216 colors.

Nearest shorthand · #118811 Nearest web-safe · #009900

Gradient to complement

#178C19 #2B792C #3E653F #525252 #653E64 #792B77 #8C178A

Color vision previews

Compare how #178C19 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.

#8F7E00

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.

#837527

Tritanopia

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

#008877

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.

#768211

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.

#707E23

Tritanomaly (50%)

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

#21894C

Grayscale (luminance)

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

#797979

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.

#598359

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 0.00857 G 0.26225 B 0.00972

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 0.25672 G 0.54086 B 0.18276

Linear Display P3

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

R 0.05361 G 0.25383 B 0.02798

CIE xyY

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

x 0.300 y 0.576 Y 19.008

CMY

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

C % 90.980 M % 45.098 Y % 90.196

Binary RGB

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

00010111 10001100 00011001