#F75721

sRGB: 247 / 87 / 33

Cosmic tempests awaken with sunrise
Gentle breezes unfold through ancient forests
Distant echoes surrender to silence

#F75721 belongs to the orange family. Its hex code tells a screen to mix 247 red, 87 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 15.1° lands in the orange region. Its 93.0% saturation makes it strong in color at this lightness. HSL lightness is 54.9% 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 (6.34:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 247, 87, 33
HSL: 15.14°, 93.04%, 54.90%
HSV / HSB: 15.14°, 86.64%, 96.86%
CMYK (approx.): 0.00%, 64.78%, 86.64%, 3.14%
CIE XYZ (D65, Y = 100 for white): 42.039, 26.704, 4.380
CIELAB (D65, 2° observer): 58.699, 58.981, 60.270
WCAG relative luminance: 0.26700
24-bit decimal: 16209697

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 #F75721 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: 6.34:1

Normal text: AA
Large text: AAA

White text: 3.31:1

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

#21C1F7 sits half a turn (180°) from #F75721 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.

#F75721 #21C1F7

Analogous

#F72156 and #F7C221 sit 30° to either side of #F75721. 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.

#F72156 #F75721 #F7C221

Triadic

#F75721, #21F757 and #5721F7 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#F75721 #21F757 #5721F7

Split complementary

Start at #F75721 and look across the wheel. #21F7C2 and #2156F7 sit 30° to either side of its exact opposite, giving you two different accent choices.

#F75721 #21F7C2 #2156F7

Square

Starting with #F75721, each quarter turn (90°) takes you to the next hue: #56F721, #21C1F7, then #C221F7. Across the square, #F75721 pairs with #21C1F7, and #56F721 with #C221F7.

#F75721 #56F721 #21C1F7 #C221F7

Tetradic

#F75721 and #21C1F7 are opposites, as are #C1F721 and #5721F7. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#F75721 #C1F721 #21C1F7 #5721F7

Tints

Mixing #F75721 with white in 20% steps produces this scale. The first mixture, #F9794D, keeps 80% of the original. By #FDDDD3, the mixture is 80% white.

#F75721 #F9794D #FA9A7A #FCBCA6 #FDDDD3 #FFFFFF

Shades

Mixing #F75721 with black in 20% steps produces this scale. The first mixture, #C6461A, keeps 80% of the original. By #311107, the mixture is 80% black.

#F75721 #C6461A #943414 #63230D #311107 #000000

Tones

Mixing #F75721 with middle gray in 20% steps produces this scale. The first mixture, #DF5F34, keeps 80% of the original. By #98786D, the mixture is 80% middle gray.

#F75721 #DF5F34 #C76747 #B0705A #98786D #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

#F75721

RGB

rgb(247 87 33)

HSL

hsl(15.140 93.043% 54.902%)

CSS example

.color-sample {
  background-color: #F75721;
  color: #000000;
}

Channel breakdown

RGB

#F75721 uses 247 red, 87 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 96.9%

Green 34.1%

Blue 12.9%

CMYK

A simple CMYK estimate for #F75721 is 0.0% cyan, 64.8% magenta, 86.6% yellow and 3.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 0.0%

Magenta 64.8%

Yellow 86.6%

Black 3.1%

Nearby colors

The nearest shorthand match is #FF5522. Its matching digit pairs let you write it as #F52 in CSS. For a modern design, keep #F75721 when you want an exact match. Use its web-safe neighbor, #FF6633, when matching a legacy palette of 216 colors.

Nearest shorthand: #FF5522 Nearest web-safe: #FF6633

Gradient to complement

#F75721 #D36945 #B07A68 #8C8C8C #689EB0 #45AFD3 #21C1F7

Color vision previews

Compare how #F75721 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.

#867716

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.

#AD9A16

Tritanopia

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

#FF244D

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.

#BA7214

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.

#C68716

Tritanomaly (50%)

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

#F95339

Grayscale (luminance)

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

#8D8D8D

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.

#CB7669

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 0.93011 G 0.09531 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 0.89721 G 0.38563 B 0.21100

Linear Display P3

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

R 0.78190 G 0.12302 B 0.03664

CIE xyY

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

x 0.575 y 0.365 Y 26.704

CMY

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

C % 3.137 M % 65.882 Y % 87.059

Binary RGB

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

11110111 01010111 00100001