#40A310

sRGB · 64 / 163 / 16

#40A310 belongs to the yellow-green family. Its hex code tells a screen to mix 64 red, 163 green and 16 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 100.4° lands in the yellow-green region. Its 82.1% saturation makes it strong in color at this lightness. HSL lightness is 35.1% 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 (6.46:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 64, 163, 16
HSL: 100.41°, 82.12%, 35.10%
HSV / HSB: 100.41°, 90.18%, 63.92%
CMYK (approx.): 60.74%, 0.00%, 90.18%, 36.08%
CIE XYZ (D65, Y = 100 for white): 15.304, 27.321, 4.957
CIELAB (D65, 2° observer): 59.270, -52.422, 58.366
WCAG relative luminance: 0.27322
24-bit decimal: 4236048

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 #40A310 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 · 6.46:1

Normal text: AA
Large text: AAA

White text · 3.25:1

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

#7310A3 sits half a turn (180°) from #40A310 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.

#40A310 #7310A3

Analogous

#89A310 and #10A32A sit 30° to either side of #40A310. 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.

#89A310 #40A310 #10A32A

Triadic

#40A310, #1040A3 and #A31040 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#40A310 #1040A3 #A31040

Split complementary

Start at #40A310 and look across the wheel. #2A10A3 and #A31089 sit 30° to either side of its exact opposite, giving you two different accent choices.

#40A310 #2A10A3 #A31089

Square

Starting with #40A310, each quarter turn (90°) takes you to the next hue: #1089A3, #7310A3, then #A32A10. Across the square, #40A310 pairs with #7310A3, and #1089A3 with #A32A10.

#40A310 #1089A3 #7310A3 #A32A10

Tetradic

#40A310 and #7310A3 are opposites, as are #10A373 and #A31040. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#40A310 #10A373 #7310A3 #A31040

Tints

Mixing #40A310 with white in 20% steps produces this scale. The first mixture, #66B540, keeps 80% of the original. By #D9EDCF, the mixture is 80% white.

#40A310 #66B540 #8CC870 #B3DA9F #D9EDCF #FFFFFF

Shades

Mixing #40A310 with black in 20% steps produces this scale. The first mixture, #33820D, keeps 80% of the original. By #0D2103, the mixture is 80% black.

#40A310 #33820D #26620A #1A4106 #0D2103 #000000

Tones

Mixing #40A310 with middle gray in 20% steps produces this scale. The first mixture, #4D9C26, keeps 80% of the original. By #73876A, the mixture is 80% middle gray.

#40A310 #4D9C26 #5A953D #668E53 #73876A #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

#40A310

RGB

rgb(64 163 16)

HSL

hsl(100.408 82.123% 35.098%)

CSS example

.color-sample {
  background-color: #40A310;
  color: #000000;
}

Channel breakdown

RGB

#40A310 uses 64 red, 163 green and 16 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 25.1%

Green 63.9%

Blue 6.3%

CMYK

A simple CMYK estimate for #40A310 is 60.7% cyan, 0.0% magenta, 90.2% yellow and 36.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 60.7%

Magenta 0.0%

Yellow 90.2%

Black 36.1%

Nearby colors

The nearest shorthand match is #44AA11. Its matching digit pairs let you write it as #4A1 in CSS. For a modern design, keep #40A310 when you want an exact match. Use its web-safe neighbor, #339900, when matching a legacy palette of 216 colors.

Nearest shorthand · #44AA11 Nearest web-safe · #339900

Gradient to complement

#40A310 #498B29 #517241 #5A5A5A #624172 #6B298B #7310A3

Color vision previews

Compare how #40A310 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.

#A89400

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.

#9C8C27

Tritanopia

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

#359D8A

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.

#8E9800

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.

#899420

Tritanomaly (50%)

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

#46A057

Grayscale (luminance)

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

#8F8F8F

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.

#709968

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 0.05127 G 0.36625 B 0.00518

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 0.36106 G 0.63089 B 0.19678

Linear Display P3

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

R 0.10719 G 0.35580 B 0.03211

CIE xyY

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

x 0.322 y 0.574 Y 27.321

CMY

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

C % 74.902 M % 36.078 Y % 93.725

Binary RGB

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

01000000 10100011 00010000