Information about #155DDA color

#155DDA color image

Basic facts about this digital color

In the Register's classification, #155DDA belongs to the Azure Color Family, featuring High Saturation and Light brightness. In numbers: rgb(21, 93, 218) (8.2% red, 36.5% green, 85.5% blue), or CMYK 77 / 49 / 0 / 15 for print. New to color codes? See our guide to RGB color codes.

A vivid, lively azure, #155DDA carries an easy, daylight feel. Designers typically reach for tones like this for accents, call-to-action elements and statement visuals. In The Official Register of Color Names it is very close to TechnoCore Blue (#0D59E9). Slightly further away sit Flickr Blue (#216BD6) and Azul (#1D5DEC).

In RGB terms — rgb(21, 93, 218) — the blue channel does the heavy lifting here. Accessibility-wise, white text works best on #155DDA: 5.8:1 contrast (passing WCAG AA) versus 3.6:1 for black. No one has named #155DDA so far. Register a name for it and it becomes a permanent record.

#155DDA color variations

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

#155DDA 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 #155DDA

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

Flickr Blue color link
Flickr Blue

#216BD6

Azul color link
Azul

#1D5DEC

Blue Eyes color link
Blue Eyes

#1569C7

Royal Blue color link
Royal Blue

#2B60DE

Tebiko color link
Tebiko

#0055E0

Celtic Blue color link
Celtic Blue

#246BCE

Atul Azul color link
Atul Azul

#124AEC

Mariner color link
Mariner

#286ACD

Science Blue color link
Science Blue

#0066CC

Conversions between color systems and etc.

  • HEX#155DDA
  • RGB21, 93, 218
  • CMYK77, 49, 0, 15
  • CSSrgb(21, 93, 218)
  • HSL218°, 82%, 47%
  • HSL Precise218.071°, 82.427%, 46.863%
  • HSV218°, 90%, 85%
  • HSB218°, 90%, 85%
  • Normalized R (0.0–1.0)0.082
  • Normalized G (0.0–1.0)0.365
  • Normalized B (0.0–1.0)0.855
  • GLSLvec3(0.082, 0.365, 0.855)
  • GLSL with alphavec4(0.082, 0.365, 0.855, 1.000)
  • HLSL / Metalfloat3(0.082, 0.365, 0.855)
  • Percentage of Red in RGB8.2%
  • Percentage of Green in RGB36.5%
  • Percentage of Blue in RGB85.5%
  • Color FamilyAzure
  • Saturation FamilyHigh Saturation
  • Lightness FamilyLight
  • HEX ID155DDA
  • DECIMAL ID1400282
  • Name LengthThis color has no name
  • This page visited6 times
  • Counting from2025-01-01