#4290df
a balanced, vivid blue · cool · closest name: steelblue
RGB
66, 144, 223
HSL
210°, 71%, 57%
CMYK
70, 35, 0, 13
Luminance
0.2643
Every format
| HEX | #4290df |
| RGB | rgb(66, 144, 223) |
| HSL | hsl(210, 71%, 57%) |
| CMYK | cmyk(70%, 35%, 0%, 13%) |
| LAB | lab(58.4 1.8 -47.1) |
| LCH | lch(58.4 47.2 272.1) |
| OKLCH | oklch(0.641 0.141 251.2) |
Copy-ready code
/* CSS */
color: #4290df;
background-color: #4290df;
/* Tailwind (arbitrary) */
class="text-[#4290df] bg-[#4290df]"
/* SCSS */
$brand: #4290df;
/* SwiftUI */
Color(red: 0.259, green: 0.565, blue: 0.875)
/* Android */
Color.parseColor("#4290df")Accessibility — WCAG contrast
Aa
#4290df on white: 3.34:1
AA ✗ fail · AA-large ✓ · AAA ✗
Aa
#4290df on black: 6.29:1
AA ✓ pass · AA-large ✓ · AAA ✗
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red25.9%
Green56.5%
Blue87.5%
CMYK percentages
Cyan70.4%
Magenta35.4%
Yellow0.0%
Key (black)12.5%
Color previews
#4290df text on a black background
contrast 6.29:1
Card sample
#4290df text on a white background
contrast 3.34:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #4290df;
Background color
Panel with #4290df background
background-color: #4290df;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #4290df;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(66, 144, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(66, 144, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4290df; background: linear-gradient(135deg, #4290df, #5D42DF);