Information about #303C55 color

#303C55 color image

Basic facts about this digital color

In the Register's classification, #303C55 belongs to the Azure Color Family, featuring Mild Saturation and Neutral brightness. The mix behind it: rgb(48, 60, 85) — 18.8% red, 23.5% green, 33.3% blue; the print equivalent is CMYK 15 / 10 / 0 / 67. Curious how these numbers work? Read our RGB color codes guide.

The color #303C55 reads as a moderately toned sky-leaning azure and holds a balanced mid-tone. Expect to see shades like this in understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is almost identical to Vintage Blue (#303D57). Its next-closest registered neighbors are Madison (#2D3C54) and Galactica (#303655).

Technically, the mix leans on its blue channel (rgb(48, 60, 85)), which gives #303C55 its character. If you plan to put text on a #303C55 background, choose white — the contrast ratio is 11.0:1 (passing WCAG AAA), while black manages only 1.9:1. On paper it relies strongly on black ink (K:67), so proof dark layouts before a large print run. No one has named #303C55 so far. Register a name for it and it becomes a permanent record.

#303C55 color variations

View this color variations of tints, shades, tones and hues.

#303C55 color harmonies

Color harmonies are pleasing color schemes created according to their position on a color wheel.

Complementary

Complementary color schemes are made by picking two opposite colors con the color wheel. They appear vibrant near to each other.

Complementary color schemes

Split complementary

Split complementary schemes are like complementary but they uses two adiacent colors of the complement. They are more flexible than complementary ones.

Split complementary color scheme

Analogous

Analogous color schemes are made by picking three colors that are next to each other on the color wheel. They are perceived as calm and serene.

Analogous color scheme

Triadic

Triadic color schemes are created by picking three colors equally spaced on the color wheel. They appear quite contrasted and multicolored.

Triadic color scheme

Tetradic

Tetradic color schemes are made form two couples of complementary colors in a rectangular shape on the color wheel.

Tetradic color scheme

Square

Square color schemes are like tetradic arranged in a square instead of rectangle. Colors appear even more contrasting.

Square color scheme

Nearest named colors to #303C55

The closest officially registered color names in the Register, ordered by similarity — your shade’s neighborhood is already being claimed.

Vintage Blue color link
Vintage Blue

#303D57

Madison color link
Madison

#2D3C54

Galactica color link
Galactica

#303655

Ares blue color link
Ares blue

#2D4255

Sputnik color link
Sputnik

#373E54

Avalanche color link
Avalanche

#354152

Cloud Burst color link
Cloud Burst

#353E4F

Midnight Oil color link
Midnight Oil

#283854

Blue Clouds color link
Blue Clouds

#273C5A

Conversions between color systems and etc.

  • HEX#303C55
  • RGB48, 60, 85
  • CMYK15, 10, 0, 67
  • CSSrgb(48, 60, 85)
  • HSL221°, 28%, 26%
  • HSL Precise220.541°, 27.82%, 26.078%
  • HSV221°, 44%, 33%
  • HSB221°, 44%, 33%
  • Normalized R (0.0–1.0)0.188
  • Normalized G (0.0–1.0)0.235
  • Normalized B (0.0–1.0)0.333
  • GLSLvec3(0.188, 0.235, 0.333)
  • GLSL with alphavec4(0.188, 0.235, 0.333, 1.000)
  • HLSL / Metalfloat3(0.188, 0.235, 0.333)
  • Percentage of Red in RGB18.8%
  • Percentage of Green in RGB23.5%
  • Percentage of Blue in RGB33.3%
  • Color FamilyAzure
  • Saturation FamilyMild Saturation
  • Lightness FamilyNeutral
  • HEX ID303C55
  • DECIMAL ID3161173
  • Name LengthThis color has no name
  • Seen by search & AI crawlers17 times
  • Counting from2025-01-01