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#181F55

#181f55 ≈ Oxford Blue

  • blue
  • Lightness: low
  • Saturation: muted
  • Cool
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#181f55 is a color from the blue family, with low lightness and muted saturation. In the RGB model it is made of 9.41% red, 12.16% green and 33.33% blue; printed in CMYK it uses 71.76% cyan, 63.53% magenta, 0% yellow and 66.67% black. Its hue angle is 233.11°, with 55.96% saturation and 21.37% lightness in HSL. It is a cool color, often associated with trust, stability and focus. Designers typically use it for technology products, finance and banking and luxury branding. White text on this color reaches a contrast ratio of 15.37:1 (WCAG AAA). The closest named color is Oxford Blue (#002147), ΔE 5.76.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#003366
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0183

Complementary

  1. #181f55
  2. #554e18

Split complementary

  1. #181f55
  2. #552f18
  3. #3d5518

Analogous

  1. #183d55
  2. #181f55
  3. #2f1855

Triadic

  1. #181f55
  2. #55181f
  3. #1f5518

Tetradic

  1. #181f55
  2. #4e1855
  3. #554e18
  4. #1f5518

Square

  1. #181f55
  2. #55183d
  3. #554e18
  4. #18552f

Monochromatic

  1. #040610
  2. #070919
  3. #181f55
  4. #293591
  5. #3e4ec8

Shades

#181f55 mixed progressively with black.

  1. #181f55
  2. #161c4d
  3. #131944
  4. #11163c
  5. #0e1333
  6. #0c102b
  7. #0a0c22
  8. #07091a
  9. #050611
  10. #020309
  11. #000000

Tints

#181f55 mixed progressively with white.

  1. #181f55
  2. #2f3566
  3. #464c77
  4. #5d6288
  5. #747999
  6. #8c8faa
  7. #a3a5bb
  8. #babccc
  9. #d1d2dd
  10. #e8e9ee
  11. #ffffff

Tones

#181f55 mixed progressively with gray.

  1. #181f55
  2. #222959
  3. #2d325e
  4. #373c62
  5. #424666
  6. #4c506b
  7. #56596f
  8. #616373
  9. #6b6d77
  10. #76767c
  11. #808080

Readable text 15.37:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 1.37:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #252525 ≈ 0.003% of males
Achromatomaly #20233d ≈ 0.001% of males
Protanopia #002857 ≈ 1.01% of males
Deuteranopia #002254 ≈ 1.27% of males
Tritanopia #002c36 ≈ 0.0001% of males
Protanomaly #072456 ≈ 1.08% of males
Deuteranomaly #012154 ≈ 4.63% of males
Tritanomaly #012744 ≈ 0.0002% of males
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Text in this color

Background in this color

Border in this color

Text color
.text-181f55 {
  color: #181f55;
}
Background
.bg-181f55 {
  background-color: #181f55;
  color: #ffffff;
}
Border
.border-181f55 {
  border: 2px solid #181f55;
}
CSS variables
:root {
  --color-primary: #181f55;
  --color-primary-rgb: 24 31 85;
  --color-primary-hsl: 233 56% 21%;
}
Gradient
.gradient-181f55 {
  background: linear-gradient(135deg, #181f55, #2f1855);
}
Colored shadow
.shadow-181f55 {
  box-shadow: 0 8px 24px rgb(24 31 85 / 0.35);
}

#002147 Oxford Blue ΔE 5.76 #191970 Midnight Blue ΔE 6.27 #32127a Persian Indigo ΔE 9.69 #003153 Prussian Blue ΔE 10.08 #002395 Imperial Blue ΔE 10.60 #000f89 Phthalo Blue ΔE 10.62 #000080 Navy ΔE 11.28 #e7e0aa Inverted #252525 Grayscale 

Oxford Blue
#181f55  rgb(24, 31, 85)  hsl(233, 56%, 21%)  Oxford Blue
#554e18  rgb(85, 78, 24)  hsl(53, 56%, 21%)  Army Green
#55181f  rgb(85, 24, 31)  hsl(353, 56%, 21%)  Caput Mortuum
#1f5518  rgb(31, 85, 24)  hsl(113, 56%, 21%)  Lincoln Green