#B3FA21

sRGB · 179 / 250 / 33

#B3FA21 belongs to the yellow-green family. Its hex code tells a screen to mix 179 red, 250 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 79.6° lands in the yellow-green region. Its 95.6% saturation makes it strong in color at this lightness. HSL lightness is 55.5% 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 (16.61:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 179, 250, 33
HSL: 79.63°, 95.59%, 55.49%
HSV / HSB: 79.63°, 86.80%, 98.04%
CMYK (approx.): 28.40%, 0.00%, 86.80%, 1.96%
CIE XYZ (D65, Y = 100 for white): 53.049, 78.063, 13.712
CIELAB (D65, 2° observer): 90.809, -48.712, 83.913
WCAG relative luminance: 0.78065
24-bit decimal: 11794977

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 #B3FA21 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 · 16.61:1

Normal text: AAA
Large text: AAA

White text · 1.26:1

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. 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

#6821FA sits half a turn (180°) from #B3FA21 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.

#B3FA21 #6821FA

Analogous

#FAD521 and #46FA21 sit 30° to either side of #B3FA21. 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.

#FAD521 #B3FA21 #46FA21

Triadic

#B3FA21, #21B3FA and #FA21B3 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#B3FA21 #21B3FA #FA21B3

Split complementary

Start at #B3FA21 and look across the wheel. #2147FA and #D521FA sit 30° to either side of its exact opposite, giving you two different accent choices.

#B3FA21 #2147FA #D521FA

Square

Starting with #B3FA21, each quarter turn (90°) takes you to the next hue: #21FAD5, #6821FA, then #FA2146. Across the square, #B3FA21 pairs with #6821FA, and #21FAD5 with #FA2146.

#B3FA21 #21FAD5 #6821FA #FA2146

Tetradic

#B3FA21 and #6821FA are opposites, as are #21FA68 and #FA21B3. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#B3FA21 #21FA68 #6821FA #FA21B3

Tints

Mixing #B3FA21 with white in 20% steps produces this scale. The first mixture, #C2FB4D, keeps 80% of the original. By #F0FED3, the mixture is 80% white.

#B3FA21 #C2FB4D #D1FC7A #E1FDA6 #F0FED3 #FFFFFF

Shades

Mixing #B3FA21 with black in 20% steps produces this scale. The first mixture, #8FC81A, keeps 80% of the original. By #243207, the mixture is 80% black.

#B3FA21 #8FC81A #6B9614 #48640D #243207 #000000

Tones

Mixing #B3FA21 with middle gray in 20% steps produces this scale. The first mixture, #A9E234, keeps 80% of the original. By #8A986D, the mixture is 80% middle gray.

#B3FA21 #A9E234 #9FC947 #94B15A #8A986D #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

#B3FA21

RGB

rgb(179 250 33)

HSL

hsl(79.631 95.595% 55.490%)

CSS example

.color-sample {
  background-color: #B3FA21;
  color: #000000;
}

Channel breakdown

RGB

#B3FA21 uses 179 red, 250 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 70.2%

Green 98.0%

Blue 12.9%

CMYK

A simple CMYK estimate for #B3FA21 is 28.4% cyan, 0.0% magenta, 86.8% yellow and 2.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 28.4%

Magenta 0.0%

Yellow 86.8%

Black 2.0%

Nearby colors

The nearest shorthand match is #BBFF22. Its matching digit pairs let you write it as #BF2 in CSS. For a modern design, keep #B3FA21 when you want an exact match. Use its web-safe neighbor, #CCFF33, when matching a legacy palette of 216 colors.

Nearest shorthand · #BBFF22 Nearest web-safe · #CCFF33

Gradient to complement

#B3FA21 #A7D645 #9AB269 #8E8E8E #8169B2 #7545D6 #6821FA

Color vision previews

Compare how #B3FA21 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.

#FFE800

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.

#FDE33F

Tritanopia

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

#BAEED5

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.

#EEEE00

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.

#EAEB36

Tritanomaly (50%)

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

#B9F589

Grayscale (luminance)

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

#E5E5E5

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.

#CEF0A9

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 0.45079 G 0.95597 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 0.76141 G 0.97279 B 0.33318

Linear Display P3

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

R 0.54048 G 0.93920 B 0.09076

CIE xyY

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

x 0.366 y 0.539 Y 78.063

CMY

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

C % 29.804 M % 1.961 Y % 87.059

Binary RGB

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

10110011 11111010 00100001