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#666CD5

#666cd5 ≈ Royal Blue

  • blue
  • Lightness: medium
  • Saturation: moderate
  • Cool
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#666cd5 is a color from the blue family, with medium lightness and moderate saturation. In the RGB model it is made of 40% red, 42.35% green and 83.53% blue; printed in CMYK it uses 52.11% cyan, 49.3% magenta, 0% yellow and 16.47% black. Its hue angle is 236.76°, with 56.92% saturation and 61.76% 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. Black text on this color reaches a contrast ratio of 4.67:1 (WCAG AA). The closest named color is Royal Blue (#4169e1), ΔE 5.45.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#6666cc
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.1835

Complementary

  1. #666cd5
  2. #d5cf66

Split complementary

  1. #666cd5
  2. #d59766
  3. #a3d566

Analogous

  1. #66a3d5
  2. #666cd5
  3. #9766d5

Triadic

  1. #666cd5
  2. #d5666c
  3. #6cd566

Tetradic

  1. #666cd5
  2. #cf66d5
  3. #d5cf66
  4. #6cd566

Square

  1. #666cd5
  2. #d566a3
  3. #d5cf66
  4. #66d597

Monochromatic

  1. #23287f
  2. #333bbb
  3. #666cd5
  4. #a2a6e5
  5. #dedff6

Shades

#666cd5 mixed progressively with black.

  1. #666cd5
  2. #5c61c0
  3. #5256aa
  4. #474c95
  5. #3d4180
  6. #33366b
  7. #292b55
  8. #1f2040
  9. #14162b
  10. #0a0b15
  11. #000000

Tints

#666cd5 mixed progressively with white.

  1. #666cd5
  2. #757bd9
  3. #8589dd
  4. #9498e2
  5. #a3a7e6
  6. #b3b6ea
  7. #c2c4ee
  8. #d1d3f2
  9. #e0e2f7
  10. #f0f0fb
  11. #ffffff

Tones

#666cd5 mixed progressively with gray.

  1. #666cd5
  2. #696ecd
  3. #6b70c4
  4. #6e72bc
  5. #7074b3
  6. #7376ab
  7. #7678a2
  8. #787a9a
  9. #7b7c91
  10. #7d7e89
  11. #808080

Readable text 4.5:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕
Readable text 4.67:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓

Achromatopsia #777777 ≈ 0.003% of males
Achromatomaly #7073a5 ≈ 0.001% of males
Protanopia #3a7bd9 ≈ 1.01% of males
Deuteranopia #2d72d3 ≈ 1.27% of males
Tritanopia #368396 ≈ 0.0001% of males
Protanomaly #4f75d7 ≈ 1.08% of males
Deuteranomaly #4a70d4 ≈ 4.63% of males
Tritanomaly #4d7bb3 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-666cd5 {
  color: #666cd5;
}
Background
.bg-666cd5 {
  background-color: #666cd5;
  color: #000000;
}
Border
.border-666cd5 {
  border: 2px solid #666cd5;
}
CSS variables
:root {
  --color-primary: #666cd5;
  --color-primary-rgb: 102 108 213;
  --color-primary-hsl: 237 57% 62%;
}
Gradient
.gradient-666cd5 {
  background: linear-gradient(135deg, #666cd5, #9766d5);
}
Colored shadow
.shadow-666cd5 {
  box-shadow: 0 8px 24px rgb(102 108 213 / 0.35);
}

#4169e1 Royal Blue ΔE 5.45 #7b68ee Medium Slate Blue ΔE 5.49 #4166f5 Ultramarine Blue ΔE 5.79 #6a5acd Slate Blue ΔE 6.27 #6050dc Majorelle Blue ΔE 8.69 #0070ff Brandeis Blue ΔE 9.01 #6082b6 Glaucous ΔE 9.12 #99932a Inverted #777777 Grayscale 

Royal Blue
#666cd5  rgb(102, 108, 213)  hsl(237, 57%, 62%)  Royal Blue
#d5cf66  rgb(213, 207, 102)  hsl(57, 57%, 62%)  Straw
#d5666c  rgb(213, 102, 108)  hsl(357, 57%, 62%)  Indian Red
#6cd566  rgb(108, 213, 102)  hsl(117, 57%, 62%)  Pastel Green