Information about #31303B color

#31303B color image

Basic facts about this digital color

In the Register's classification, #31303B belongs to the Blue Color Family, featuring Low Saturation and Dark brightness. In numbers: rgb(49, 48, 59) (19.2% red, 18.8% green, 23.1% blue), or CMYK 4 / 4 / 0 / 77 for print. New to color codes? See our guide to RGB color codes.

A softly toned classic blue, #31303B leans clearly toward the dark side. Designers typically reach for tones like this for night-mode interfaces and high-contrast pairings with light text. In The Official Register of Color Names it is practically indistinguishable from Crater Smoke (#2F2E3A). Its next-closest registered neighbors are Woody Bay (#33343A) and Double Tuna (#2F3237).

Technically, the mix leans on its blue channel (rgb(49, 48, 59)), which gives #31303B its character. If you plan to put text on a #31303B background, choose white — the contrast ratio is 13.0:1 (passing WCAG AAA), while black manages only 1.6:1. On paper it relies strongly on black ink (K:77), so proof dark layouts before a large print run. No one has named #31303B so far. Register a name for it and it becomes a permanent record.

#31303B color variations

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

#31303B 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 #31303B

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

Crater Smoke color link
Crater Smoke

#2F2E3A

Woody Bay color link
Woody Bay

#33343A

Double Tuna color link
Double Tuna

#2F3237

Gumboot color link
Gumboot

#313337

Catch color link
Catch

#34343C

Black Rock color link
Black Rock

#2C2D3C

Grey Friars color link
Grey Friars

#313436

Tao Grey color link
Tao Grey

#323436

Shark color link
Shark

#34363A

#31303B color backgrounds & wallpapers

Download color wallpaper / background for your Desktop PC, Tablet or Mobile phone.

Conversions between color systems and etc.

  • HEX#31303B
  • RGB49, 48, 59
  • CMYK4, 4, 0, 77
  • HSL245°, 10%, 21%
  • HSL Precise245.455°, 10.28%, 20.98%
  • HSV245°, 19%, 23%
  • HSB245°, 19%, 23%
  • HEX ID31303B
  • DECIMAL ID3223611
  • Name LengthThis color has no name
  • Color Family (Hue)Blue
  • Saturation FamilyLow Saturation
  • Lightness FamilyDark
  • Percentage of Red in RGB19.2%
  • Percentage of Green in RGB18.8%
  • Percentage of Blue in RGB23.1%
  • This page visited6 times
  • Counting from2025-01-01