Ultramarine (Blue)
#3700DF
RGB: 55, 0, 223
Color OverviewHEX #3700DF
#3700DF Color Code Information
In the RGB color space, #3700DF is composed of 22% red, 0% green, and 87% blue. In the HSL color space, it has a hue of 255°, saturation of 100%, and lightness of 44%.
HEX
#3700DF
RGB
55, 0, 223
HSL
255°, 100%, 44%
HSV
255°, 100%, 87%
CMYK
75%, 100%, 0%, 13%
Name Match
Ultramarine
Closest StandardCSS Code & Tailwind Declarations
Ready-to-use style sheets and arbitrary classes for web development.
CSS Variables
:root {
--color-brand: #3700DF;
}
.element {
color: #3700DF;
background: #3700DF;
}Tailwind v4 Classes
<!-- Tailwind Arbitrary --> <div className="bg-[#3700DF] text-[#3700DF] border-[#3700DF]"> #3700DF </div>
Shades of #3700DF (Darker Variations)
Progressively mixed with black for depth, borders, and shadows.
Tints of #3700DF (Lighter Variations)
Progressively mixed with pure white for subtle backgrounds and badges.
Tones of #3700DF (Muted Variations)
Mixed with neutral gray to create soft, low-contrast variants.
Color Summary
Color NameUltramarine
LuminanceDark (Deep)
Hue Angle255° (Cool/Blue)
Print Ink (K)13% Key Black
Harmonious Color Palettes for #3700DF
Calculated color schemes based on classic geometric color wheel angles for graphic and web design.
Complementary
Analogous
Split Complementary
Monochromatic
WCAG Accessibility Contrast Ratios
Verification against Web Content Accessibility Guidelines (WCAG 2.1) standards for web text readability.
Sample Text on #3700DF Background
Contrast Ratio against Pure White (#FFFFFF):9.43 : 1
WCAG AA (4.5:1)
WCAG AAA (7.0:1)
Sample Text on #3700DF Background
Contrast Ratio against Pure Black (#000000):2.23 : 1
WCAG AA (4.5:1)
WCAG AAA (7.0:1)
Related Popular Colors
Explore more colorsLight
Dark
Light
Light
Dark
Light