#E37310

sRGB · 227 / 115 / 16

#E37310 belongs to the orange family. Its hex code tells a screen to mix 227 red, 115 green and 16 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 28.2° lands in the orange region. Its 86.8% saturation makes it strong in color at this lightness. HSL lightness is 47.6% 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 (6.73:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 227, 115, 16
HSL: 28.15°, 86.83%, 47.65%
HSV / HSB: 28.15°, 92.95%, 89.02%
CMYK (approx.): 0.00%, 49.34%, 92.95%, 10.98%
CIE XYZ (D65, Y = 100 for white): 37.902, 28.632, 4.021
CIELAB (D65, 2° observer): 60.456, 38.476, 65.223
WCAG relative luminance: 0.28630
24-bit decimal: 14906128

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 #E37310 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 · 6.73:1

Normal text: AA
Large text: AAA

White text · 3.12:1

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. 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

#1080E3 sits half a turn (180°) from #E37310 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.

#E37310 #1080E3

Analogous

#E31017 and #E3DD10 sit 30° to either side of #E37310. 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.

#E31017 #E37310 #E3DD10

Triadic

#E37310, #10E373 and #7310E3 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#E37310 #10E373 #7310E3

Split complementary

Start at #E37310 and look across the wheel. #10E3DC and #1017E3 sit 30° to either side of its exact opposite, giving you two different accent choices.

#E37310 #10E3DC #1017E3

Square

Starting with #E37310, each quarter turn (90°) takes you to the next hue: #16E310, #1080E3, then #DC10E3. Across the square, #E37310 pairs with #1080E3, and #16E310 with #DC10E3.

#E37310 #16E310 #1080E3 #DC10E3

Tetradic

#E37310 and #1080E3 are opposites, as are #80E310 and #7310E3. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#E37310 #80E310 #1080E3 #7310E3

Tints

Mixing #E37310 with white in 20% steps produces this scale. The first mixture, #E98F40, keeps 80% of the original. By #F9E3CF, the mixture is 80% white.

#E37310 #E98F40 #EEAB70 #F4C79F #F9E3CF #FFFFFF

Shades

Mixing #E37310 with black in 20% steps produces this scale. The first mixture, #B65C0D, keeps 80% of the original. By #2D1703, the mixture is 80% black.

#E37310 #B65C0D #88450A #5B2E06 #2D1703 #000000

Tones

Mixing #E37310 with middle gray in 20% steps produces this scale. The first mixture, #CF7626, keeps 80% of the original. By #947D6A, the mixture is 80% middle gray.

#E37310 #CF7626 #BB783D #A87B53 #947D6A #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

#E37310

RGB

rgb(227 115 16)

HSL

hsl(28.152 86.831% 47.647%)

CSS example

.color-sample {
  background-color: #E37310;
  color: #000000;
}

Channel breakdown

RGB

#E37310 uses 227 red, 115 green and 16 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 89.0%

Green 45.1%

Blue 6.3%

CMYK

A simple CMYK estimate for #E37310 is 0.0% cyan, 49.3% magenta, 93.0% yellow and 11.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 0.0%

Magenta 49.3%

Yellow 93.0%

Black 11.0%

Nearby colors

The nearest shorthand match is #DD7711. Its matching digit pairs let you write it as #D71 in CSS. For a modern design, keep #E37310 when you want an exact match. Use its web-safe neighbor, #CC6600, when matching a legacy palette of 216 colors.

Nearest shorthand · #DD7711 Nearest web-safe · #CC6600

Gradient to complement

#E37310 #C07533 #9D7756 #7A7A7A #567C9D #337EC0 #1080E3

Color vision previews

Compare how #E37310 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.

#948200

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.

#AF9C0B

Tritanopia

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

#F95963

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.

#B68000

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.

#BF8F06

Tritanomaly (50%)

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

#E56F40

Grayscale (luminance)

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

#929292

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.

#C0846B

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 0.76815 G 0.17144 B 0.00518

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 0.83352 G 0.47456 B 0.19060

Linear Display P3

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

R 0.66221 G 0.19125 B 0.03025

CIE xyY

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

x 0.537 y 0.406 Y 28.632

CMY

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

C % 10.980 M % 54.902 Y % 93.725

Binary RGB

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

11100011 01110011 00010000