ColorTool
Log in
#1745BB

#1745bb ≈ Cobalt Blue

  • blue
  • Lightness: medium
  • Saturation: strong
  • Cool
Check contrast Explore in graph Random color

#1745bb is a color from the blue family, with medium lightness and strong saturation. In the RGB model it is made of 9.02% red, 27.06% green and 73.33% blue; printed in CMYK it uses 87.7% cyan, 63.1% magenta, 0% yellow and 26.67% black. Its hue angle is 223.17°, with 78.1% saturation and 41.18% 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 brand accents. White text on this color reaches a contrast ratio of 8.06:1 (WCAG AAA). The closest named color is Cobalt Blue (#0047ab), ΔE 3.2.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#0033cc
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0803

Complementary

  1. #1745bb
  2. #bb8d17

Split complementary

  1. #1745bb
  2. #bb3b17
  3. #97bb17

Analogous

  1. #1797bb
  2. #1745bb
  3. #3b17bb

Triadic

  1. #1745bb
  2. #bb1745
  3. #45bb17

Tetradic

  1. #1745bb
  2. #8d17bb
  3. #bb8d17
  4. #45bb17

Square

  1. #1745bb
  2. #bb1797
  3. #bb8d17
  4. #17bb3b

Monochromatic

  1. #061333
  2. #0f2c77
  3. #1745bb
  4. #3869e7
  5. #7c9cef

Shades

#1745bb mixed progressively with black.

  1. #1745bb
  2. #153ea8
  3. #123796
  4. #103083
  5. #0e2970
  6. #0c235e
  7. #091c4b
  8. #071538
  9. #050e25
  10. #020713
  11. #000000

Tints

#1745bb mixed progressively with white.

  1. #1745bb
  2. #2e58c2
  3. #456ac9
  4. #5d7dcf
  5. #748fd6
  6. #8ba2dd
  7. #a2b5e4
  8. #b9c7eb
  9. #d1daf1
  10. #e8ecf8
  11. #ffffff

Tones

#1745bb mixed progressively with gray.

  1. #1745bb
  2. #224bb5
  3. #2c51af
  4. #3757a9
  5. #415da3
  6. #4c639e
  7. #566898
  8. #616e92
  9. #6b748c
  10. #767a86
  11. #808080

Readable text 8.06:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.61:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #505050 ≈ 0.003% of males
Achromatomaly #404c88 ≈ 0.001% of males
Protanopia #0058bf ≈ 1.01% of males
Deuteranopia #0049b9 ≈ 1.27% of males
Tritanopia #006479 ≈ 0.0001% of males
Protanomaly #0051bd ≈ 1.08% of males
Deuteranomaly #0047ba ≈ 4.63% of males
Tritanomaly #005998 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-1745bb {
  color: #1745bb;
}
Background
.bg-1745bb {
  background-color: #1745bb;
  color: #ffffff;
}
Border
.border-1745bb {
  border: 2px solid #1745bb;
}
CSS variables
:root {
  --color-primary: #1745bb;
  --color-primary-rgb: 23 69 187;
  --color-primary-hsl: 223 78% 41%;
}
Gradient
.gradient-1745bb {
  background: linear-gradient(135deg, #1745bb, #3b17bb);
}
Colored shadow
.shadow-1745bb {
  box-shadow: 0 8px 24px rgb(23 69 187 / 0.35);
}

#0047ab Cobalt Blue ΔE 3.20 #1c39bb Persian Blue ΔE 3.78 #0f52ba Sapphire ΔE 4.67 #1034a6 Egyptian Blue ΔE 5.54 #4f42b5 Ocean Blue ΔE 6.46 #003399 Smalt ΔE 6.72 #0f4d92 Yale Blue ΔE 7.46 #e8ba44 Inverted #505050 Grayscale 

Cobalt Blue
#1745bb  rgb(23, 69, 187)  hsl(223, 78%, 41%)  Cobalt Blue
#bb8d17  rgb(187, 141, 23)  hsl(43, 78%, 41%)  Dark Goldenrod
#bb1745  rgb(187, 23, 69)  hsl(343, 78%, 41%)  Cardinal
#45bb17  rgb(69, 187, 23)  hsl(103, 78%, 41%)  Kelly Green