Cerulean Blue Color

HEX #2A52BE / RGB (42, 82, 190)

What is Cerulean Blue Color?

Cerulean Blue (Hex code: 2A52BE) Thumbnail

Cerulean Blue has the hex code #2A52BE. The equivalent RGB values are (42, 82, 190), which means it is composed of 13% red, 26% green and 61% blue. The CMYK color codes, used in printers, are C:78 M:57 Y:0 K:26. In the HSV/HSB scale, Cerulean Blue has a hue of 224°, 78% saturation and a brightness value of 75%.
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.

Discovered in 1789 by Albrecht Höpfner, a Swiss chemist, Cerulean blue is an expensive pigment which is now replaced by cobalt chromate. The color is not included in the web colors list and cannot be used by name in HTML and CSS code. However, cerulean blue can be applied to web pages with its hex code, RGB and/or HSL values. Please note that the CMYK numbers listed on this page have been derived from the hexadecimal code using known formulae and are only approximates.

Download Cerulean Blue Solid Color Background

Cerulean Blue Color Codes

Hex Code#2A52BE
RGB Values(42, 82, 190)
CMYK Values(78%, 57%, 0%, 26%)
HSV/HSB Values(224°, 78%, 75%)
Closest Web Safe#3366CC
Inverse Color#D5AD41 [Gold (Metallic)]
Closest Pantone®7455 C
Closest RAL5015 [Sky blue]
Complementary Color#BE962A [University Of California Gold]
Cerulean Blue Converted to Grayscale Codes
Simple Average#696969
Weighted Average (Most Common)#525252
Weighted Average (Luma)#515151
Weighted Average (Gamma Adjusted)#949494

Cerulean Blue Color Palettes

Complementary color palette of 2A52BE. Complementary color is BE962A

Complementary Palette

The complement of Cerulean Blue is University Of California Gold with the hex code #BE962A. Complementary colors are those found at the opposite ends of the color wheel. Thus, as per the RGB system, the best contrast to #2A52BE color is offered by #BE962A. 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.

2A52BE BE962A
Analogous color palette with (2A52BE, 4C2ABE and 2A9CBE)

Analogous Palette

The analogous colors of Cerulean Blue (#2A52BE) are Ocean Blue (#4C2ABE) and Moonstone (#2A9CBE). In the RGB color wheel, these two analogous colors occur to the right and left of Cerulean 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.

Split Complementary color palette with (2A52BE, BE4C2A and 9CBE2A)

Split-Complementary Palette

As per the RGB color wheel, the split-complementary colors of Cerulean Blue (#2A52BE) are #BE4C2A (Dark Pastel Red) and #9CBE2A (Yellow-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.

Triadic color palette with (2A52BE, BE2A52 and 52BE2A)

Triadic Palette

Cerulean Blue triadic color palette has three colors each of which is separated by 120° in the RGB wheel. Thus, #BE2A52 (Dingy Dungeon) and #52BE2A (Kelly Green) along with #2A52BE create a stunning and beautiful triadic palette with the maximum variation in hue and, therefore, offering the best possible contrast when taken together.

2A52BE BE2A52 52BE2A
Tetradic color palette with (2A52BE, BE2A52, BE962A and 2ABE96)

Tetradic Palette

The tetradic palette of Cerulean Blue has four colors - #BE2A52 (Dingy Dungeon), #BE962A (University Of California Gold) and #2ABE96 (Mountain Meadow) in addition to the base color (#2A52BE). 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.

2A52BE BE2A52 BE962A 2ABE96
Square color palette with (2A52BE, BE2A9C, BE962A and 2ABE4C)

Square Palette

Cerulean Blue square color palette has #BE2A9C (Byzantine), #BE962A (University Of California Gold) and #2ABE4C (American 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.

Rainbow color

Cerulean Blue Color Rainbow Palette

Our Cerulean 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.


Tints, Tones & Shades of Cerulean Blue Color


  • Transparent 5575CB5575CB
  • Transparent 6A86D26A86D2
  • Transparent 7F97D87F97D8
  • Transparent 95A9DF95A9DF
  • Transparent AABAE5AABAE5
  • Transparent BFCBECBFCBEC
  • Transparent D4DCF2D4DCF2
  • Transparent EAEEF9EAEEF9


  • Transparent 3B5BB23B5BB2
  • Transparent 4460AB4460AB
  • Transparent 4C64A54C64A5
  • Transparent 55699F55699F
  • Transparent 5E6E995E6E99
  • Transparent 667293667293
  • Transparent 6F778C6F778C
  • Transparent 777B86777B86


  • Transparent 224298224298
  • Transparent 1D39851D3985
  • Transparent 193172193172
  • Transparent 15295F15295F
  • Transparent 11214C11214C
  • Transparent 0D19390D1939
  • Transparent 081026081026
  • Transparent 040813040813

Cerulean Blue Color Patterns

  • Transparent

    Cerulean Blue Gingham Checks

  • Transparent

    Cerulean Blue Vertical Stripes Pattern

  • Transparent

    Cerulean Blue Polka Dots Pattern

  • Transparent

    Cerulean Blue Honeycomb Pattern

  • Transparent

    Cerulean Blue Leaves Pattern

  • Transparent

    Cerulean Blue Houndstooth Pattern

  • Transparent

    Cerulean Blue Trellis Pattern

  • Transparent

    Cerulean Blue Plaid Pattern

Cerulean Blue Color Interior Ideas

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

Cerulean Blue Color Drawing Room Textured Wall Paint Idea

Pretty Photo frame on Cerulean Blue color Living room wal color

Cerulean Blue Color Living Room Wall Paint Idea

Pretty Photo frame on Cerulean Blue color Bedroom interior wall color

Cerulean Blue Color Bedroom Wall Paint Idea

Pretty Photo frame on Cerulean Blue color kitchen interior wall color

Cerulean Blue Color Kitchen Wall Paint Idea