#ABDF21

sRGB: 171 / 223 / 33

#ABDF21 belongs to the yellow-green family. Its hex code tells a screen to mix 171 red, 223 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 76.4° lands in the yellow-green region. Its 74.8% saturation makes it strong in color at this lightness. HSL lightness is 50.2% 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 (13.31:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 171, 223, 33
HSL: 76.42°, 74.80%, 50.20%
HSV / HSB: 76.42°, 85.20%, 87.45%
CMYK (approx.): 23.32%, 0.00%, 85.20%, 12.55%
CIE XYZ (D65, Y = 100 for white): 43.455, 61.542, 11.028
CIELAB (D65, 2° observer): 82.669, -40.111, 76.898
WCAG relative luminance: 0.61543
24-bit decimal: 11263777

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 #ABDF21 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: 13.31:1

Normal text: AAA
Large text: AAA

White text: 1.58:1

Normal text: Fail
Large text: Fail

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

#5521DF sits half a turn (180°) from #ABDF21 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.

#ABDF21 #5521DF

Analogous

#DFB421 and #4CDF21 sit 30° to either side of #ABDF21. 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.

#DFB421 #ABDF21 #4CDF21

Triadic

#ABDF21, #21ABDF and #DF21AB are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#ABDF21 #21ABDF #DF21AB

Split complementary

Start at #ABDF21 and look across the wheel. #214CDF and #B421DF sit 30° to either side of its exact opposite, giving you two different accent choices.

#ABDF21 #214CDF #B421DF

Square

Starting with #ABDF21, each quarter turn (90°) takes you to the next hue: #21DFB4, #5521DF, then #DF214C. Across the square, #ABDF21 pairs with #5521DF, and #21DFB4 with #DF214C.

#ABDF21 #21DFB4 #5521DF #DF214C

Tetradic

#ABDF21 and #5521DF are opposites, as are #21DF55 and #DF21AB. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#ABDF21 #21DF55 #5521DF #DF21AB

Tints

Mixing #ABDF21 with white in 20% steps produces this scale. The first mixture, #BCE54D, keeps 80% of the original. By #EEF9D3, the mixture is 80% white.

#ABDF21 #BCE54D #CDEC7A #DDF2A6 #EEF9D3 #FFFFFF

Shades

Mixing #ABDF21 with black in 20% steps produces this scale. The first mixture, #89B21A, keeps 80% of the original. By #222D07, the mixture is 80% black.

#ABDF21 #89B21A #678614 #44590D #222D07 #000000

Tones

Mixing #ABDF21 with middle gray in 20% steps produces this scale. The first mixture, #A2CC34, keeps 80% of the original. By #89936D, the mixture is 80% middle gray.

#ABDF21 #A2CC34 #9AB947 #91A65A #89936D #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

#ABDF21

RGB

rgb(171 223 33)

HSL

hsl(76.421 74.803% 50.196%)

CSS example

.color-sample {
  background-color: #ABDF21;
  color: #000000;
}

Channel breakdown

RGB

#ABDF21 uses 171 red, 223 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 67.1%

Green 87.5%

Blue 12.9%

CMYK

A simple CMYK estimate for #ABDF21 is 23.3% cyan, 0.0% magenta, 85.2% yellow and 12.5% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 23.3%

Magenta 0.0%

Yellow 85.2%

Black 12.5%

Nearby colors

The nearest shorthand match is #AADD22. Its matching digit pairs let you write it as #AD2 in CSS. For a modern design, keep #ABDF21 when you want an exact match. Use its web-safe neighbor, #99CC33, when matching a legacy palette of 216 colors.

Nearest shorthand: #AADD22 Nearest web-safe: #99CC33

Gradient to complement

#ABDF21 #9DBF41 #8EA060 #808080 #7260A0 #6341BF #5521DF

Color vision previews

Compare how #ABDF21 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.

#ECD000

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.

#E5CD39

Tritanopia

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

#B3D4BE

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.

#D8D500

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.

#D6D331

Tritanomaly (50%)

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

#B0DB7B

Grayscale (luminance)

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

#CECECE

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.

#BDD798

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 0.40724 G 0.73791 B 0.01521

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 0.71247 G 0.86872 B 0.30199

Linear Display P3

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

R 0.46595 G 0.72693 B 0.07423

CIE xyY

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

x 0.375 y 0.530 Y 61.542

CMY

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

C % 32.941 M % 12.549 Y % 87.059

Binary RGB

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

10101011 11011111 00100001