#33CA21

sRGB · 51 / 202 / 33

#33CA21 belongs to the green family. Its hex code tells a screen to mix 51 red, 202 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 113.6° lands in the green region. Its 71.9% saturation makes it strong in color at this lightness. HSL lightness is 46.1% 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 (9.61:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 51, 202, 33
HSL: 113.61°, 71.91%, 46.08%
HSV / HSB: 113.61°, 83.66%, 79.22%
CMYK (approx.): 74.75%, 0.00%, 83.66%, 20.78%
CIE XYZ (D65, Y = 100 for white): 22.759, 43.053, 8.549
CIELAB (D65, 2° observer): 71.591, -67.058, 65.382
WCAG relative luminance: 0.43055
24-bit decimal: 3394081

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 #33CA21 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 · 9.61:1

Normal text: AAA
Large text: AAA

White text · 2.19:1

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

#B821CA sits half a turn (180°) from #33CA21 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.

#33CA21 #B821CA

Analogous

#87CA21 and #21CA64 sit 30° to either side of #33CA21. 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.

#87CA21 #33CA21 #21CA64

Triadic

#33CA21, #2133CA and #CA2133 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#33CA21 #2133CA #CA2133

Split complementary

Start at #33CA21 and look across the wheel. #6421CA and #CA2187 sit 30° to either side of its exact opposite, giving you two different accent choices.

#33CA21 #6421CA #CA2187

Square

Starting with #33CA21, each quarter turn (90°) takes you to the next hue: #2187CA, #B821CA, then #CA6421. Across the square, #33CA21 pairs with #B821CA, and #2187CA with #CA6421.

#33CA21 #2187CA #B821CA #CA6421

Tetradic

#33CA21 and #B821CA are opposites, as are #21CAB8 and #CA2133. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#33CA21 #21CAB8 #B821CA #CA2133

Tints

Mixing #33CA21 with white in 20% steps produces this scale. The first mixture, #5CD54D, keeps 80% of the original. By #D6F4D3, the mixture is 80% white.

#33CA21 #5CD54D #85DF7A #ADEAA6 #D6F4D3 #FFFFFF

Shades

Mixing #33CA21 with black in 20% steps produces this scale. The first mixture, #29A21A, keeps 80% of the original. By #0A2807, the mixture is 80% black.

#33CA21 #29A21A #1F7914 #14510D #0A2807 #000000

Tones

Mixing #33CA21 with middle gray in 20% steps produces this scale. The first mixture, #42BB34, keeps 80% of the original. By #718F6D, the mixture is 80% middle gray.

#33CA21 #42BB34 #52AC47 #619E5A #718F6D #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

#33CA21

RGB

rgb(51 202 33)

HSL

hsl(113.609 71.915% 46.078%)

CSS example

.color-sample {
  background-color: #33CA21;
  color: #000000;
}

Channel breakdown

RGB

#33CA21 uses 51 red, 202 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 20.0%

Green 79.2%

Blue 12.9%

CMYK

A simple CMYK estimate for #33CA21 is 74.8% cyan, 0.0% magenta, 83.7% yellow and 20.8% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 74.8%

Magenta 0.0%

Yellow 83.7%

Black 20.8%

Nearby colors

The nearest shorthand match is #33CC22. Its matching digit pairs let you write it as #3C2 in CSS. For a modern design, keep #33CA21 when you want an exact match. Use its web-safe neighbor, #33CC33, when matching a legacy palette of 216 colors.

Nearest shorthand · #33CC22 Nearest web-safe · #33CC33

Gradient to complement

#33CA21 #49AE3D #5F9259 #767676 #8C5992 #A23DAE #B821CA

Color vision previews

Compare how #33CA21 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.

#CFB600

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.

#BEAB38

Tritanopia

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

#00C4AC

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.

#ACBC11

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.

#A5B631

Tritanomaly (50%)

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

#3FC66F

Grayscale (luminance)

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

#AFAFAF

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.

#84BD82

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 0.03310 G 0.59062 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 0.39888 G 0.78099 B 0.26519

Linear Display P3

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

R 0.13208 G 0.57211 B 0.05717

CIE xyY

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

x 0.306 y 0.579 Y 43.053

CMY

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

C % 80.000 M % 20.784 Y % 87.059

Binary RGB

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

00110011 11001010 00100001