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Coastal Blue Color

HEX #55A9DC / RGB (85, 169, 220)

What is Coastal Blue Color?

Coastal Blue (Hex code: 55A9DC) Thumbnail

Coastal Blue has the hex code #55A9DC. The equivalent RGB values are (85, 169, 220), which means it is composed of 18% red, 36% green and 46% blue. The CMYK color codes, used in printers, are C:61 M:23 Y:0 K:14. In the HSV/HSB scale, Coastal Blue has a hue of 203°, 61% saturation and a brightness value of 86%.
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.

Coastal Blue is not part of the web colors list and, therefore, cannot be used by name in HTML and CSS code. The best way to apply the color to a web page is to put in its hex, RGB or HSL values. Please also note that the Coastal Blue CMYK numbers mentioned on this page are only approximations and have been calculated from the hex code using well-known formulae.

Download Coastal Blue Solid Color Background

Coastal Blue Color Codes

Hex Code#55A9DC
RGB Values(85, 169, 220)
CMYK Values(61%, 23%, 0%, 14%)
HSV/HSB Values(203°, 61%, 86%)
Closest Web Safe#6699CC
Inverse Color#AA5623 [Dirty Brown]
Closest Pantone®2915 C
Closest RAL5024 [Pastel blue]
Complementary Color#DC8855 [Raw Sienna]
Coastal Blue Converted to Grayscale Codes
Simple Average#9E9E9E
Weighted Average (Most Common)#959595
Weighted Average (Luma)#9B9B9B
Weighted Average (Gamma Adjusted)#C6C6C6

Coastal Blue Color Palettes

Complementary color palette of 55A9DC. Complementary color is DC8855

Complementary Palette

The complement of Coastal Blue is Raw Sienna with the hex code #DC8855. Complementary colors are those found at the opposite ends of the color wheel. Thus, as per the RGB system, the best contrast to #55A9DC color is offered by #DC8855. 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.

55A9DC DC8855
Analogous color palette with (55A9DC, 5566DC and 55DCCC)

Analogous Palette

The analogous colors of Coastal Blue (#55A9DC) are Royal Blue (#5566DC) and Medium Turquoise (#55DCCC). In the RGB color wheel, these two analogous colors occur to the right and left of Coastal Blue 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.

55A9DC 5566DC 55DCCC
Split Complementary color palette with (55A9DC, DC5566 and DCCC55)

Split-Complementary Palette

As per the RGB color wheel, the split-complementary colors of Coastal Blue (#55A9DC) are #DC5566 (Indian Red) and #DCCC55 (Chinese Green). 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.

55A9DC DC5566 DCCC55
Triadic color palette with (55A9DC, DC55A9 and A9DC55)

Triadic Palette

Coastal Blue triadic color palette has three colors each of which is separated by 120° in the RGB wheel. Thus, #DC55A9 (Raspberry Pink) and #A9DC55 (Inchworm) along with #55A9DC create a stunning and beautiful triadic palette with the maximum variation in hue and, therefore, offering the best possible contrast when taken together.

55A9DC DC55A9 A9DC55
Tetradic color palette with (55A9DC, DC55A9, DC8855 and 55DC88)

Tetradic Palette

The tetradic palette of Coastal Blue has four colors - #DC55A9 (Raspberry Pink), #DC8855 (Raw Sienna) and #55DC88 (Very Light Malachite Green) in addition to the base color (#55A9DC). 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.

55A9DC DC55A9 DC8855 55DC88
Square color palette with (55A9DC, CC55DC, DC8855 and 66DC55)

Square Palette

Coastal Blue square color palette has #CC55DC (Medium Orchid), #DC8855 (Raw Sienna) and #66DC55 (Mantis). 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.

55A9DC CC55DC DC8855 66DC55
Rainbow color

Coastal Blue Color Rainbow Palette

Our Coastal Blue 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.

55A8DC 7555DC DC55CF DC555B DCC355 82DC55 55DC9C

Tints, Tones & Shades of Coastal Blue Color


  • Transparent 77BAE377BAE3
  • Transparent 88C3E788C3E7
  • Transparent 99CBEA99CBEA
  • Transparent AAD4EEAAD4EE
  • Transparent BBDDF1BBDDF1
  • Transparent CCE5F5CCE5F5
  • Transparent DDEEF8DDEEF8
  • Transparent EEF6FCEEF6FC


  • Transparent 5EA1CA5EA1CA
  • Transparent 629DC0629DC0
  • Transparent 6699B76699B7
  • Transparent 6B95AE6B95AE
  • Transparent 6F90A56F90A5
  • Transparent 738C9C738C9C
  • Transparent 778892778892
  • Transparent 7C84897C8489


  • Transparent 4487B04487B0
  • Transparent 3C769A3C769A
  • Transparent 336584336584
  • Transparent 2B556E2B556E
  • Transparent 224458224458
  • Transparent 1A33421A3342
  • Transparent 11222C11222C
  • Transparent 091116091116

Coastal Blue Color Patterns

  • Transparent

    Coastal Blue Gingham Checks

  • Transparent

    Coastal Blue Vertical Stripes Pattern

  • Transparent

    Coastal Blue Polka Dots Pattern

  • Transparent

    Coastal Blue Honeycomb Pattern

  • Transparent

    Coastal Blue Leaves Pattern

  • Transparent

    Coastal Blue Houndstooth Pattern

  • Transparent

    Coastal Blue Trellis Pattern

  • Transparent

    Coastal Blue Plaid Pattern

Coastal Blue Color Interior Ideas

Pretty Photo frame on Coastal Blue color drawing room interior textured wall

Coastal Blue Color Drawing Room Textured Wall Paint Idea

Pretty Photo frame on Coastal Blue color Living room wal color

Coastal Blue Color Living Room Wall Paint Idea

Pretty Photo frame on Coastal Blue color Bedroom interior wall color

Coastal Blue Color Bedroom Wall Paint Idea

Pretty Photo frame on Coastal Blue color kitchen interior wall color

Coastal Blue Color Kitchen Wall Paint Idea