#FF37BC

sRGB: 255 / 55 / 188

Cosmic tempests reshape eternity
Solitary lanterns unfold through ancient forests
Eternal flames awaken sleeping galaxies

#FF37BC belongs to the rose family. Its hex code tells a screen to mix 255 red, 55 green and 188 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 320.1° lands in the rose region. Its 100.0% saturation makes it strong in color at this lightness. HSL lightness is 60.8% 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 (6.52:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 255, 55, 188
HSL: 320.10°, 100.00%, 60.78%
HSV / HSB: 320.10°, 78.43%, 100.00%
CMYK (approx.): 0.00%, 78.43%, 26.27%, 0.00%
CIE XYZ (D65, Y = 100 for white): 51.681, 27.627, 50.189
CIELAB (D65, 2° observer): 59.550, 82.458, -24.226
WCAG relative luminance: 0.27623
24-bit decimal: 16725948

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 #FF37BC 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: 6.52:1

Normal text: AA
Large text: AAA

White text: 3.22:1

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

#37FF7A sits half a turn (180°) from #FF37BC 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.

#FF37BC #37FF7A

Analogous

#DE37FF and #FF3758 sit 30° to either side of #FF37BC. 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.

#DE37FF #FF37BC #FF3758

Triadic

#FF37BC, #BCFF37 and #37BCFF are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#FF37BC #BCFF37 #37BCFF

Split complementary

Start at #FF37BC and look across the wheel. #58FF37 and #37FFDE sit 30° to either side of its exact opposite, giving you two different accent choices.

#FF37BC #58FF37 #37FFDE

Square

Starting with #FF37BC, each quarter turn (90°) takes you to the next hue: #FFDE37, #37FF7A, then #3758FF. Across the square, #FF37BC pairs with #37FF7A, and #FFDE37 with #3758FF.

#FF37BC #FFDE37 #37FF7A #3758FF

Tetradic

#FF37BC and #37FF7A are opposites, as are #FF7A37 and #37BCFF. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#FF37BC #FF7A37 #37FF7A #37BCFF

Tints

Mixing #FF37BC with white in 20% steps produces this scale. The first mixture, #FF5FC9, keeps 80% of the original. By #FFD7F2, the mixture is 80% white.

#FF37BC #FF5FC9 #FF87D7 #FFAFE4 #FFD7F2 #FFFFFF

Shades

Mixing #FF37BC with black in 20% steps produces this scale. The first mixture, #CC2C96, keeps 80% of the original. By #330B26, the mixture is 80% black.

#FF37BC #CC2C96 #992171 #66164B #330B26 #000000

Tones

Mixing #FF37BC with middle gray in 20% steps produces this scale. The first mixture, #E646B0, keeps 80% of the original. By #99718C, the mixture is 80% middle gray.

#FF37BC #E646B0 #CC54A4 #B36398 #99718C #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

#FF37BC

RGB

rgb(255 55 188)

HSL

hsl(320.100 100.000% 60.784%)

CSS example

.color-sample {
  background-color: #FF37BC;
  color: #000000;
}

Channel breakdown

RGB

#FF37BC uses 255 red, 55 green and 188 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 100.0%

Green 21.6%

Blue 73.7%

CMYK

A simple CMYK estimate for #FF37BC is 0.0% cyan, 78.4% magenta, 26.3% yellow and 0.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 0.0%

Magenta 78.4%

Yellow 26.3%

Black 0.0%

Nearby colors

The nearest shorthand match is #FF33BB. Its matching digit pairs let you write it as #F3B in CSS. For a modern design, keep #FF37BC when you want an exact match. Use its web-safe neighbor, #FF33CC, when matching a legacy palette of 216 colors.

Nearest shorthand: #FF33BB Nearest web-safe: #FF33CC

Gradient to complement

#FF37BC #DE58B1 #BC7AA6 #9B9B9B #7ABC90 #58DE85 #37FF7A

Color vision previews

Compare how #FF37BC 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.

#547ABF

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.

#929BB8

Tritanopia

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

#FF3277

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.

#AC6EBD

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.

#BA84B9

Tritanomaly (50%)

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

#FF42A8

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.

#D16EA8

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 1.00000 G 0.03820 B 0.50289

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 0.92082 G 0.29364 B 0.72050

Linear Display P3

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

R 0.82924 G 0.07013 B 0.47774

CIE xyY

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

x 0.399 y 0.213 Y 27.627

CMY

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

C % 0.000 M % 78.431 Y % 26.275

Binary RGB

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

11111111 00110111 10111100