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Natural Indigo Color

HEX #003740 / RGB (0, 55, 64)

Indigo Cushion Pillows

What is Natural Indigo Color?

Natural Indigo (Hex code: 003740) Thumbnail

Natural Indigo has the hex code #003740. The equivalent RGB values are (0, 55, 64), which means it is composed of 0% red, 46% green and 54% blue. The CMYK color codes, used in printers, are C:100 M:14 Y:0 K:75. In the HSV/HSB scale, Natural Indigo has a hue of 188°, 100% saturation and a brightness value of 25%.
Details of other color codes including equivalent web safe and HTML & CSS colors are given in the table below. Also listed are the closest Pantone® (PMS) and RAL colors.

Natural Indigo is from the RAL Design list where it is included with the number 220 20 20. RAL is a popular color matching system used in several European countries like Germany, Italy, France and the United Kingdom. RAL Design, which has colors for interiors, is different from the RAL Classic list.

Natural Indigo color hex code is #003740 which can be used along with RGB (0, 55, 64) or HSL values in HTML and/or CSS to display the color on web pages. Please note that the corresponding CMYK values and the Pantone (PMS) number listed on this page have been calculated from the hexadecimal color code and are only approximations.

Download Natural Indigo Solid Color Background

Natural Indigo Color Codes

Hex Code#003740
RGB Values(0, 55, 64)
CMYK Values(100%, 14%, 0%, 75%)
HSV/HSB Values(188°, 100%, 25%)
Closest Web Safe#003333
Inverse Color#FFC8BF [Spanish Pink]
Closest Pantone®547 C
Closest RAL5020 [Ocean blue]
Complementary Color#400900 [Black Bean]
Natural Indigo Converted to Grayscale Codes
Simple Average#282828
Weighted Average (Most Common)#272727
Weighted Average (Luma)#2C2C2C
Weighted Average (Gamma Adjusted)#6F6F6F

Natural Indigo Color Palettes

Complementary color palette of 003740. Complementary color is 400900

Complementary Palette

The complement of Natural Indigo is Black Bean with the hex code #400900. Complementary colors are those found at the opposite ends of the color wheel. Thus, as per the RGB system, the best contrast to #003740 color is offered by #400900. The complementary color palette is easiest to use and work with. Studies have shown that contrasting color palette is the best way to grab a viewer's attention.

003740 400900
Analogous color palette with (003740, 001740 and 004029)

Analogous Palette

The analogous colors of Natural Indigo (#003740) are Cetacean Blue (#001740) and British Racing Green (#004029). In the RGB color wheel, these two analogous colors occur to the right and left of Natural Indigo with a 30° separation on either side. An analogous color palette is extremely soothing to the eyes and works wonders if your main color is soft or pastel.

003740 001740 004029
Split Complementary color palette with (003740, 400017 and 402900)

Split-Complementary Palette

As per the RGB color wheel, the split-complementary colors of Natural Indigo (#003740) are #400017 (Chocolate Brown) and #402900 (American Bronze). A split-complementary color palette consists of the main color along with those on either side (30°) of the complementary color. Based on our research, usage of split-complementary palettes is on the rise online, especially in graphics and web sites designs. It may be because it is not as contrasting as the complementary color palette and, hence, results in a combination which is pleasant to the eyes.

003740 400017 402900
Triadic color palette with (003740, 400037 and 374000)

Triadic Palette

Natural Indigo triadic color palette has three colors each of which is separated by 120° in the RGB wheel. Thus, #400037 (Dark Chocolate (Hershey's)) and #374000 (Dark Bronze (Coin)) along with #003740 create a stunning and beautiful triadic palette with the maximum variation in hue and, therefore, offering the best possible contrast when taken together.

003740 400037 374000
Tetradic color palette with (003740, 400037, 400900 and 004009)

Tetradic Palette

The tetradic palette of Natural Indigo has four colors - #400037 (Dark Chocolate (Hershey's)), #400900 (Black Bean) and #004009 (Forest Green (Traditional)) in addition to the base color (#003740). A tetradic color palette is complex and, in most cases, should not be used off-the-shelf. We suggest tweaking the colors slightly to achieve desired results.

003740 400037 400900 004009
Square color palette with (003740, 290040, 400900 and 174000)

Square Palette

Natural Indigo square color palette has #290040 (Russian Violet), #400900 (Black Bean) and #174000 (Lincoln Green). Quite like triadic, the hues in a square palette are at the maximum distance from each other, which is 90°.
Note: For several colors purposes, a square palette may look much better than the tetrad color palette.

003740 290040 400900 174000
Rainbow color

Natural Indigo Color Rainbow Palette

Our Natural Indigo rainbow color palette is based on the RGB model and consists of 7 colors, just like the traditional rainbow. You might not see a lot of variation in color, especially if the chosen color is dark or extremely light. However, this can lead interesting rainbow palettes that are faded, soft, pastel or dull.

003740 000140 360040 400013 402400 254000 004012

Tints, Tones & Shades of Natural Indigo Color


  • Transparent 335F66335F66
  • Transparent 4D73794D7379
  • Transparent 66878C66878C
  • Transparent 809BA0809BA0
  • Transparent 99AFB399AFB3
  • Transparent B3C3C6B3C3C6
  • Transparent CCD7D9CCD7D9
  • Transparent E6EBECE6EBEC


  • Transparent 1A464D1A464D
  • Transparent 264D53264D53
  • Transparent 33545A33545A
  • Transparent 405C60405C60
  • Transparent 4D63664D6366
  • Transparent 5A6A6D5A6A6D
  • Transparent 667173667173
  • Transparent 73797A73797A


  • Transparent 002C33002C33
  • Transparent 00272D00272D
  • Transparent 002126002126
  • Transparent 001C20001C20
  • Transparent 00161A00161A
  • Transparent 001113001113
  • Transparent 000B0D000B0D
  • Transparent 000606000606

Natural Indigo Color Patterns

  • Transparent

    Natural Indigo Gingham Checks

  • Transparent

    Natural Indigo Vertical Stripes Pattern

  • Transparent

    Natural Indigo Polka Dots Pattern

  • Transparent

    Natural Indigo Honeycomb Pattern

  • Transparent

    Natural Indigo Leaves Pattern

  • Transparent

    Natural Indigo Houndstooth Pattern

  • Transparent

    Natural Indigo Trellis Pattern

  • Transparent

    Natural Indigo Plaid Pattern

Natural Indigo Color Interior Ideas

Pretty Photo frame on Natural Indigo color drawing room interior textured wall

Natural Indigo Color Drawing Room Textured Wall Paint Idea

Pretty Photo frame on Natural Indigo color Living room wal color

Natural Indigo Color Living Room Wall Paint Idea

Pretty Photo frame on Natural Indigo color Bedroom interior wall color

Natural Indigo Color Bedroom Wall Paint Idea

Pretty Photo frame on Natural Indigo color kitchen interior wall color

Natural Indigo Color Kitchen Wall Paint Idea

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