ColorTool
Log in
#103EA3

#103ea3 ≈ Cobalt Blue

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

#103ea3 is a color from the blue family, with low lightness and strong saturation. In the RGB model it is made of 6.27% red, 24.31% green and 63.92% blue; printed in CMYK it uses 90.18% cyan, 61.96% magenta, 0% yellow and 36.08% black. Its hue angle is 221.22°, with 82.12% saturation and 35.1% 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 9.38:1 (WCAG AAA). The closest named color is Cobalt Blue (#0047ab), ΔE 3.23.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#003399
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.062

Complementary

  1. #103ea3
  2. #a37510

Split complementary

  1. #103ea3
  2. #a32b10
  3. #88a310

Analogous

  1. #1088a3
  2. #103ea3
  3. #2b10a3

Triadic

  1. #103ea3
  2. #a3103e
  3. #3ea310

Tetradic

  1. #103ea3
  2. #7510a3
  3. #a37510
  4. #3ea310

Square

  1. #103ea3
  2. #a31088
  3. #a37510
  4. #10a32b

Monochromatic

  1. #020918
  2. #09245d
  3. #103ea3
  4. #1759e8
  5. #5d8bef

Shades

#103ea3 mixed progressively with black.

  1. #103ea3
  2. #0e3893
  3. #0d3282
  4. #0b2b72
  5. #0a2562
  6. #081f52
  7. #061941
  8. #051331
  9. #030c21
  10. #020610
  11. #000000

Tints

#103ea3 mixed progressively with white.

  1. #103ea3
  2. #2851ac
  3. #4065b5
  4. #5878bf
  5. #708bc8
  6. #889fd1
  7. #9fb2da
  8. #b7c5e3
  9. #cfd8ed
  10. #e7ecf6
  11. #ffffff

Tones

#103ea3 mixed progressively with gray.

  1. #103ea3
  2. #1b45a0
  3. #264b9c
  4. #325299
  5. #3d5895
  6. #485f92
  7. #53668e
  8. #5e6c8b
  9. #6a7387
  10. #757984
  11. #808080

Readable text 9.38:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.24:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #464646 ≈ 0.003% of males
Achromatomaly #384377 ≈ 0.001% of males
Protanopia #004da6 ≈ 1.01% of males
Deuteranopia #0040a1 ≈ 1.27% of males
Tritanopia #00586a ≈ 0.0001% of males
Protanomaly #0048a5 ≈ 1.08% of males
Deuteranomaly #003fa2 ≈ 4.63% of males
Tritanomaly #004f85 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-103ea3 {
  color: #103ea3;
}
Background
.bg-103ea3 {
  background-color: #103ea3;
  color: #ffffff;
}
Border
.border-103ea3 {
  border: 2px solid #103ea3;
}
CSS variables
:root {
  --color-primary: #103ea3;
  --color-primary-rgb: 16 62 163;
  --color-primary-hsl: 221 82% 35%;
}
Gradient
.gradient-103ea3 {
  background: linear-gradient(135deg, #103ea3, #2b10a3);
}
Colored shadow
.shadow-103ea3 {
  box-shadow: 0 8px 24px rgb(16 62 163 / 0.35);
}

#0047ab Cobalt Blue ΔE 3.23 #1034a6 Egyptian Blue ΔE 3.39 #003399 Smalt ΔE 3.43 #1c39bb Persian Blue ΔE 4.42 #0f4d92 Yale Blue ΔE 6.72 #0f52ba Sapphire ΔE 6.86 #4f42b5 Ocean Blue ΔE 7.88 #efc15c Inverted #464646 Grayscale 

Cobalt Blue
#103ea3  rgb(16, 62, 163)  hsl(221, 82%, 35%)  Cobalt Blue
#a37510  rgb(163, 117, 16)  hsl(41, 82%, 35%)  Dark Goldenrod
#a3103e  rgb(163, 16, 62)  hsl(341, 82%, 35%)  Vivid Burgundy
#3ea310  rgb(62, 163, 16)  hsl(101, 82%, 35%)  Kelly Green