Closest named color · ΔE 1.94
#104FEF
Closest named color · ΔE 1.94
#104FEF
Does it pop as a button? Stay readable as a background? Survive at badge size?
If an entire site used it as the primary color, it would feel like this —
Body copy goes here. The primary drives buttons and links, tints fill backgrounds, text uses the highest-contrast color.
Get startedHarmonious schemes generated from color theory.
How this color performs against black and white text.
White text on this background
Aa Ratio 6.2:1
Black text on this background
Aa Ratio 3.39:1
:root {
--color: #104FEF;
--color-rgb: 16, 79, 239;
--color-hsl: 223, 87.5%, 50%;
}
.bg-color { background-color: #104FEF; }
.text-on-color { color: #ffffff; }
.border-color { border-color: #104FEF; }
.gradient {
background-image: linear-gradient(90deg, #104FEF 0%, 0066FF 100%);
}Nearest official code in each standard system, ranked by CIEDE2000.
Official color from public brand materials (simple-icons CC0 dataset)
What the ancients would have called this color.
The same color, as named in Japanese tradition.
Based on the Machado (2009) model - see how this color appears to 8 types of color vision.
Normal vision
#104FEF
Standard trichromatic vision with all three cone types functioning.
Protanomaly
#1C54F4
Abnormal L cone sensitivity (~1% of men). Weakened red perception.
Protanopia
#2558F8
Missing L cones (~1% of men). Reds are hard to perceive.
Deuteranomaly
#1249EC
Abnormal M cone sensitivity (~6% of men). The most common deficiency.
Deuteranopia
#1345EB
Missing M cones (~1% of men). Reds and greens are confused.
Tritanomaly
#0060AC
Abnormal S cone sensitivity (extremely rare). Weakened blue-yellow perception.
Tritanopia
#006C7F
Missing S cones (extremely rare). Blues and yellows are confused.
Achromatomaly
#324F97
Severely weakened color vision (~0.001%). Colors appear washed out.
Achromatopsia
#4D4D4D
No color vision at all (~0.003%). The world is shades of grey.
Closest names by CIEDE2000 perceptual distance.
Colors one step away in the RGB space — each with its own profile page.
Common derivatives of this color: lighter / darker / more saturated / less saturated, plus inverted, grayscale, web-safe and the nearest HTML named color. Click any to open its page.
Copy-paste snippets: foreground text, background, text shadow and a complementary gradient.
Text readability sample
color: #104FEF;Text readability sample
background-color: #104FEF;Text readability sample
text-shadow: 0.1em 0.1em 0.15em #104FEF;linear-gradient(90deg, #104FEF, #EFB010)Drag hue, saturation and lightness to preview live - find the version that feels right.
This is the color with hex code #104FEF. Its RGB channels are 16, 79, 239; the closest human-readable name is "Opulent Blue" (ΔE 1.94, CIEDE2000).
#104FEF is rgb(16, 79, 239) in RGB, hsl(223, 87.5%, 50%) in HSL and cmyk(93.3%, 66.9%, 0%, 6.3%) in CMYK.
Its complement #EFB010 works best, along with triadic and analogous harmonies - see the harmony section below to copy full palettes.
Contrast with black text is 3.39:1 and with white text 6.2:1. WCAG 2.1 requires at least 4.5:1 for body text (AA) and 3:1 for large text.