#400A71

sRGB: 64 / 10 / 113

#400A71 belongs to the violet family. Its hex code tells a screen to mix 64 red, 10 green and 113 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 271.5° lands in the violet region. Its 83.7% saturation makes it strong in color at this lightness. HSL lightness is 24.1% on a scale from black (0%) to white (100%). Of black and white lettering, white has the clearer light-to-dark separation on this background (14.00:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 64, 10, 113
HSL: 271.46°, 83.74%, 24.12%
HSV / HSB: 271.46°, 91.15%, 44.31%
CMYK (approx.): 43.36%, 91.15%, 0.00%, 55.69%
CIE XYZ (D65, Y = 100 for white): 5.203, 2.499, 15.832
CIELAB (D65, 2° observer): 17.916, 43.663, -46.685
WCAG relative luminance: 0.02499
24-bit decimal: 4196977

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 #400A71 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: 1.50:1

Normal text: Fail
Large text: Fail

White text: 14.00:1

Normal text: AAA
Large text: AAA

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

#3B710A sits half a turn (180°) from #400A71 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.

#400A71 #3B710A

Analogous

#0C0A71 and #710A6F sit 30° to either side of #400A71. 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.

#0C0A71 #400A71 #710A6F

Triadic

#400A71, #71400A and #0A7140 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#400A71 #71400A #0A7140

Split complementary

Start at #400A71 and look across the wheel. #6F710A and #0A710C sit 30° to either side of its exact opposite, giving you two different accent choices.

#400A71 #6F710A #0A710C

Square

Starting with #400A71, each quarter turn (90°) takes you to the next hue: #710C0A, #3B710A, then #0A6F71. Across the square, #400A71 pairs with #3B710A, and #710C0A with #0A6F71.

#400A71 #710C0A #3B710A #0A6F71

Tetradic

#400A71 and #3B710A are opposites, as are #710A3B and #0A7140. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#400A71 #710A3B #3B710A #0A7140

Tints

Mixing #400A71 with white in 20% steps produces this scale. The first mixture, #663B8D, keeps 80% of the original. By #D9CEE3, the mixture is 80% white.

#400A71 #663B8D #8C6CAA #B39DC6 #D9CEE3 #FFFFFF

Shades

Mixing #400A71 with black in 20% steps produces this scale. The first mixture, #33085A, keeps 80% of the original. By #0D0217, the mixture is 80% black.

#400A71 #33085A #260644 #1A042D #0D0217 #000000

Tones

Mixing #400A71 with middle gray in 20% steps produces this scale. The first mixture, #4D2274, keeps 80% of the original. By #73687D, the mixture is 80% middle gray.

#400A71 #4D2274 #5A3977 #66517A #73687D #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

#400A71

RGB

rgb(64 10 113)

HSL

hsl(271.456 83.740% 24.118%)

CSS example

.color-sample {
  background-color: #400A71;
  color: #FFFFFF;
}

Channel breakdown

RGB

#400A71 uses 64 red, 10 green and 113 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 25.1%

Green 3.9%

Blue 44.3%

CMYK

A simple CMYK estimate for #400A71 is 43.4% cyan, 91.2% magenta, 0.0% yellow and 55.7% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 43.4%

Magenta 91.2%

Yellow 0.0%

Black 55.7%

Nearby colors

The nearest shorthand match is #441177. Its matching digit pairs let you write it as #417 in CSS. For a modern design, keep #400A71 when you want an exact match. Use its web-safe neighbor, #330066, when matching a legacy palette of 216 colors.

Nearest shorthand: #441177 Nearest web-safe: #330066

Gradient to complement

#400A71 #3F1B60 #3E2C4F #3E3E3E #3D4F2C #3C601B #3B710A

Color vision previews

Compare how #400A71 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.

#002B74

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.

#002B6F

Tritanopia

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

#342A41

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.

#092472

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.

#0E2470

Tritanomaly (50%)

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

#3C1A63

Grayscale (luminance)

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

#2C2C2C

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.

#371F57

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 0.05127 G 0.00304 B 0.16513

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 0.22855 G 0.05742 B 0.42551

Linear Display P3

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

R 0.04271 G 0.00464 B 0.15145

CIE xyY

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

x 0.221 y 0.106 Y 2.499

CMY

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

C % 74.902 M % 96.078 Y % 55.686

Binary RGB

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

01000000 00001010 01110001