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#304BB2

#304bb2 ≈ Cobalt Blue

  • blue
  • Lightness: medium
  • Saturation: strong
  • Cool
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#304bb2 is a color from the blue family, with medium lightness and strong saturation. In the RGB model it is made of 18.82% red, 29.41% green and 69.8% blue; printed in CMYK it uses 73.03% cyan, 57.87% magenta, 0% yellow and 30.2% black. Its hue angle is 227.54°, with 57.52% saturation and 44.31% 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 7.57:1 (WCAG AAA). The closest named color is Cobalt Blue (#0047ab), ΔE 3.53.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#333399
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0887

Complementary

  1. #304bb2
  2. #b29730

Split complementary

  1. #304bb2
  2. #b25630
  3. #8cb230

Analogous

  1. #308cb2
  2. #304bb2
  3. #5630b2

Triadic

  1. #304bb2
  2. #b2304b
  3. #4bb230

Tetradic

  1. #304bb2
  2. #9730b2
  3. #b29730
  4. #4bb230

Square

  1. #304bb2
  2. #b2308c
  3. #b29730
  4. #30b256

Monochromatic

  1. #101839
  2. #203276
  3. #304bb2
  4. #5c74d3
  5. #98a7e3

Shades

#304bb2 mixed progressively with black.

  1. #304bb2
  2. #2b44a0
  3. #263c8e
  4. #22357d
  5. #1d2d6b
  6. #182659
  7. #131e47
  8. #0e1735
  9. #0a0f24
  10. #050812
  11. #000000

Tints

#304bb2 mixed progressively with white.

  1. #304bb2
  2. #455dba
  3. #596fc1
  4. #6e81c9
  5. #8393d1
  6. #98a5d9
  7. #acb7e0
  8. #c1c9e8
  9. #d6dbf0
  10. #eaedf7
  11. #ffffff

Tones

#304bb2 mixed progressively with gray.

  1. #304bb2
  2. #3850ad
  3. #4056a8
  4. #485ba3
  5. #50609e
  6. #586699
  7. #606b94
  8. #68708f
  9. #70758a
  10. #787b85
  11. #808080

Readable text 7.57:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.77:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #545454 ≈ 0.003% of males
Achromatomaly #485184 ≈ 0.001% of males
Protanopia #005ab5 ≈ 1.01% of males
Deuteranopia #004eb0 ≈ 1.27% of males
Tritanopia #006577 ≈ 0.0001% of males
Protanomaly #0e55b4 ≈ 1.08% of males
Deuteranomaly #004db1 ≈ 4.63% of males
Tritanomaly #005b92 ≈ 0.0002% of males
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Text in this color

Background in this color

Border in this color

Text color
.text-304bb2 {
  color: #304bb2;
}
Background
.bg-304bb2 {
  background-color: #304bb2;
  color: #ffffff;
}
Border
.border-304bb2 {
  border: 2px solid #304bb2;
}
CSS variables
:root {
  --color-primary: #304bb2;
  --color-primary-rgb: 48 75 178;
  --color-primary-hsl: 228 58% 44%;
}
Gradient
.gradient-304bb2 {
  background: linear-gradient(135deg, #304bb2, #5630b2);
}
Colored shadow
.shadow-304bb2 {
  box-shadow: 0 8px 24px rgb(48 75 178 / 0.35);
}

#0047ab Cobalt Blue ΔE 3.53 #0f52ba Sapphire ΔE 3.95 #1c39bb Persian Blue ΔE 5.56 #4f42b5 Ocean Blue ΔE 6.05 #0f4d92 Yale Blue ΔE 6.90 #1034a6 Egyptian Blue ΔE 6.97 #5a4fcf Iris ΔE 7.54 #cfb44d Inverted #545454 Grayscale 

Cobalt Blue
#304bb2  rgb(48, 75, 178)  hsl(228, 58%, 44%)  Cobalt Blue
#b29730  rgb(178, 151, 48)  hsl(48, 58%, 44%)  Brass
#b2304b  rgb(178, 48, 75)  hsl(348, 58%, 44%)  Cardinal
#4bb230  rgb(75, 178, 48)  hsl(108, 58%, 44%)  Kelly Green