#31900A

sRGB: 49 / 144 / 10

#31900A belongs to the yellow-green family. Its hex code tells a screen to mix 49 red, 144 green and 10 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 102.5° lands in the yellow-green region. Its 87.0% saturation makes it strong in color at this lightness. HSL lightness is 30.2% 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 (5.12:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 49, 144, 10
HSL: 102.54°, 87.01%, 30.20%
HSV / HSB: 102.54°, 93.06%, 56.47%
CMYK (approx.): 65.97%, 0.00%, 93.06%, 43.53%
CIE XYZ (D65, Y = 100 for white): 11.294, 20.621, 3.672
CIELAB (D65, 2° observer): 52.532, -49.579, 53.545
WCAG relative luminance: 0.20621
24-bit decimal: 3248138

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 #31900A 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: 5.12:1

Normal text: AA
Large text: AAA

White text: 4.10:1

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.

Reference: 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

#690A90 sits half a turn (180°) from #31900A 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.

#31900A #690A90

Analogous

#74900A and #0A9026 sit 30° to either side of #31900A. 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.

#74900A #31900A #0A9026

Triadic

#31900A, #0A3190 and #900A31 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#31900A #0A3190 #900A31

Split complementary

Start at #31900A and look across the wheel. #260A90 and #900A74 sit 30° to either side of its exact opposite, giving you two different accent choices.

#31900A #260A90 #900A74

Square

Starting with #31900A, each quarter turn (90°) takes you to the next hue: #0A7490, #690A90, then #90260A. Across the square, #31900A pairs with #690A90, and #0A7490 with #90260A.

#31900A #0A7490 #690A90 #90260A

Tetradic

#31900A and #690A90 are opposites, as are #0A9069 and #900A31. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#31900A #0A9069 #690A90 #900A31

Tints

Mixing #31900A with white in 20% steps produces this scale. The first mixture, #5AA63B, keeps 80% of the original. By #D6E9CE, the mixture is 80% white.

#31900A #5AA63B #83BC6C #ADD39D #D6E9CE #FFFFFF

Shades

Mixing #31900A with black in 20% steps produces this scale. The first mixture, #277308, keeps 80% of the original. By #0A1D02, the mixture is 80% black.

#31900A #277308 #1D5606 #143A04 #0A1D02 #000000

Tones

Mixing #31900A with middle gray in 20% steps produces this scale. The first mixture, #418D22, keeps 80% of the original. By #708368, the mixture is 80% middle gray.

#31900A #418D22 #518A39 #608651 #708368 #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

#31900A

RGB

rgb(49 144 10)

HSL

hsl(102.537 87.013% 30.196%)

CSS example

.color-sample {
  background-color: #31900A;
  color: #000000;
}

Channel breakdown

RGB

#31900A uses 49 red, 144 green and 10 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 19.2%

Green 56.5%

Blue 3.9%

CMYK

A simple CMYK estimate for #31900A is 66.0% cyan, 0.0% magenta, 93.1% yellow and 43.5% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 66.0%

Magenta 0.0%

Yellow 93.1%

Black 43.5%

Nearby colors

The nearest shorthand match is #338811. Its matching digit pairs let you write it as #381 in CSS. For a modern design, keep #31900A when you want an exact match. Use its web-safe neighbor, #339900, when matching a legacy palette of 216 colors.

Nearest shorthand: #338811 Nearest web-safe: #339900

Gradient to complement

#31900A #3A7A20 #446337 #4D4D4D #563763 #60207A #690A90

Color vision previews

Compare how #31900A 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.

#948200

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.

#897A20

Tritanopia

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

#238B7A

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.

#7C8600

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.

#77821A

Tritanomaly (50%)

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

#378D4C

Grayscale (luminance)

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

#7D7D7D

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.

#61875B

Reference: National Eye Institute: Types of Color Vision Deficiency

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 0.03071 G 0.27889 B 0.00304

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 0.30308 G 0.55701 B 0.16599

Linear Display P3

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

R 0.07477 G 0.27066 B 0.02348

CIE xyY

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

x 0.317 y 0.579 Y 20.621

CMY

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

C % 80.784 M % 43.529 Y % 96.078

Binary RGB

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

00110001 10010000 00001010