ColorTool
Log in
#3666EA

#3666ea ≈ Royal Blue

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

#3666ea is a color from the blue family, with medium lightness and strong saturation. In the RGB model it is made of 21.18% red, 40% green and 91.76% blue; printed in CMYK it uses 76.92% cyan, 56.41% magenta, 0% yellow and 8.24% black. Its hue angle is 224°, with 81.08% saturation and 56.47% 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 call-to-action buttons. White text on this color reaches a contrast ratio of 4.95:1 (WCAG AA). The closest named color is Royal Blue (#4169e1), ΔE 1.41.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#3366ff
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.1623

Complementary

  1. #3666ea
  2. #eaba36

Split complementary

  1. #3666ea
  2. #ea6036
  3. #c0ea36

Analogous

  1. #36c0ea
  2. #3666ea
  3. #6036ea

Triadic

  1. #3666ea
  2. #ea3666
  3. #66ea36

Tetradic

  1. #3666ea
  2. #ba36ea
  3. #eaba36
  4. #66ea36

Square

  1. #3666ea
  2. #ea36c0
  3. #eaba36
  4. #36ea60

Monochromatic

  1. #0d2a7a
  2. #1442bf
  3. #3666ea
  4. #7b9bf1
  5. #c1cff8

Shades

#3666ea mixed progressively with black.

  1. #3666ea
  2. #315cd3
  3. #2b52bb
  4. #2647a4
  5. #203d8c
  6. #1b3375
  7. #16295e
  8. #101f46
  9. #0b142f
  10. #050a17
  11. #000000

Tints

#3666ea mixed progressively with white.

  1. #3666ea
  2. #4a75ec
  3. #5e85ee
  4. #7294f0
  5. #86a3f2
  6. #9bb3f5
  7. #afc2f7
  8. #c3d1f9
  9. #d7e0fb
  10. #ebf0fd
  11. #ffffff

Tones

#3666ea mixed progressively with gray.

  1. #3666ea
  2. #3d69df
  3. #456bd5
  4. #4c6eca
  5. #5470c0
  6. #5b73b5
  7. #6276aa
  8. #6a78a0
  9. #717b95
  10. #797d8b
  11. #808080

Readable text 4.95:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓
Readable text 4.25:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕

Achromatopsia #707070 ≈ 0.003% of males
Achromatomaly #5e6caf ≈ 0.001% of males
Protanopia #0079ee ≈ 1.01% of males
Deuteranopia #0068e7 ≈ 1.27% of males
Tritanopia #00879e ≈ 0.0001% of males
Protanomaly #0372ed ≈ 1.08% of males
Deuteranomaly #0067e8 ≈ 4.63% of males
Tritanomaly #007bc1 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-3666ea {
  color: #3666ea;
}
Background
.bg-3666ea {
  background-color: #3666ea;
  color: #ffffff;
}
Border
.border-3666ea {
  border: 2px solid #3666ea;
}
CSS variables
:root {
  --color-primary: #3666ea;
  --color-primary-rgb: 54 102 234;
  --color-primary-hsl: 224 81% 56%;
}
Gradient
.gradient-3666ea {
  background: linear-gradient(135deg, #3666ea, #6036ea);
}
Colored shadow
.shadow-3666ea {
  box-shadow: 0 8px 24px rgb(54 102 234 / 0.35);
}

#4169e1 Royal Blue ΔE 1.41 #4166f5 Ultramarine Blue ΔE 2.13 #0070ff Brandeis Blue ΔE 4.66 #1560bd Denim ΔE 7.47 #0073cf True Blue ΔE 8.56 #436b95 Queen Blue ΔE 8.98 #6a5acd Slate Blue ΔE 9.27 #c99915 Inverted #707070 Grayscale 

Royal Blue
#3666ea  rgb(54, 102, 234)  hsl(224, 81%, 56%)  Royal Blue
#eaba36  rgb(234, 186, 54)  hsl(44, 81%, 56%)  Meat Brown
#ea3666  rgb(234, 54, 102)  hsl(344, 81%, 56%)  Cerise
#66ea36  rgb(102, 234, 54)  hsl(104, 81%, 56%)  Neon Green