#FD3909

sRGB: 253 / 57 / 9

Cosmic tempests command forgotten kingdoms
Solitary lanterns cascade across forgotten valleys
Lost whispers reveal unspoken wonders

#FD3909 belongs to the red family. Its hex code tells a screen to mix 253 red, 57 green and 9 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 11.8° lands in the red region. Its 98.4% saturation makes it strong in color at this lightness. HSL lightness is 51.4% 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 (5.77:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 253, 57, 9
HSL: 11.80°, 98.39%, 51.37%
HSV / HSB: 11.80°, 96.44%, 99.22%
CMYK (approx.): 0.00%, 77.47%, 96.44%, 0.78%
CIE XYZ (D65, Y = 100 for white): 42.019, 23.832, 2.646
CIELAB (D65, 2° observer): 55.920, 70.901, 66.072
WCAG relative luminance: 0.23829
24-bit decimal: 16595209

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 #FD3909 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: 5.77:1

Normal text: AA
Large text: AAA

White text: 3.64:1

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

#09CDFD sits half a turn (180°) from #FD3909 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.

#FD3909 #09CDFD

Analogous

#FD0953 and #FDB309 sit 30° to either side of #FD3909. 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.

#FD0953 #FD3909 #FDB309

Triadic

#FD3909, #09FD39 and #3909FD are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#FD3909 #09FD39 #3909FD

Split complementary

Start at #FD3909 and look across the wheel. #09FDB3 and #0953FD sit 30° to either side of its exact opposite, giving you two different accent choices.

#FD3909 #09FDB3 #0953FD

Square

Starting with #FD3909, each quarter turn (90°) takes you to the next hue: #53FD09, #09CDFD, then #B309FD. Across the square, #FD3909 pairs with #09CDFD, and #53FD09 with #B309FD.

#FD3909 #53FD09 #09CDFD #B309FD

Tetradic

#FD3909 and #09CDFD are opposites, as are #CDFD09 and #3909FD. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#FD3909 #CDFD09 #09CDFD #3909FD

Tints

Mixing #FD3909 with white in 20% steps produces this scale. The first mixture, #FD613A, keeps 80% of the original. By #FFD7CE, the mixture is 80% white.

#FD3909 #FD613A #FE886B #FEB09D #FFD7CE #FFFFFF

Shades

Mixing #FD3909 with black in 20% steps produces this scale. The first mixture, #CA2E07, keeps 80% of the original. By #330B02, the mixture is 80% black.

#FD3909 #CA2E07 #982205 #651704 #330B02 #000000

Tones

Mixing #FD3909 with middle gray in 20% steps produces this scale. The first mixture, #E44721, keeps 80% of the original. By #997268, the mixture is 80% middle gray.

#FD3909 #E44721 #CB5539 #B26450 #997268 #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

#FD3909

RGB

rgb(253 57 9)

HSL

hsl(11.803 98.387% 51.373%)

CSS example

.color-sample {
  background-color: #FD3909;
  color: #000000;
}

Channel breakdown

RGB

#FD3909 uses 253 red, 57 green and 9 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 99.2%

Green 22.4%

Blue 3.5%

CMYK

A simple CMYK estimate for #FD3909 is 0.0% cyan, 77.5% magenta, 96.4% yellow and 0.8% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 0.0%

Magenta 77.5%

Yellow 96.4%

Black 0.8%

Nearby colors

The nearest shorthand match is #FF3311. Its matching digit pairs let you write it as #F31 in CSS. For a modern design, keep #FD3909 when you want an exact match. Use its web-safe neighbor, #FF3300, when matching a legacy palette of 216 colors.

Nearest shorthand: #FF3311 Nearest web-safe: #FF3300

Gradient to complement

#FD3909 #D45232 #AC6A5A #838383 #5A9CAC #32B4D4 #09CDFD

Color vision previews

Compare how #FD3909 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.

#796A00

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.

#A99500

Tritanopia

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

#FF0034

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.

#B86300

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.

#C67F00

Tritanomaly (50%)

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

#FF3325

Grayscale (luminance)

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

#868686

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.

#CD6861

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 0.98225 G 0.04092 B 0.00273

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 0.91386 G 0.29782 B 0.16101

Linear Display P3

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

R 0.81513 G 0.07216 B 0.02223

CIE xyY

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

x 0.613 y 0.348 Y 23.832

CMY

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

C % 0.784 M % 77.647 Y % 96.471

Binary RGB

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

11111101 00111001 00001001