#516CB9
Closest named color: French Blue (#436BAD). oklch(54.7% 0.124 267.6), rgb(81, 108, 185).
Aa
White text reads best on this color (5.00:1).
About this color
#516CB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.124 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.026 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #516CB9 |
| RGB | rgb(81, 108, 185) |
| HSL | hsl(224, 43%, 52%) |
| OKLCH | oklch(54.7% 0.124 267.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #516CB9 | 5.00:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #516CB9 | 4.19:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #516CB9 text on white | 5.00:1 | AA | Lc 74.4 | Content text, not long reading |
| #516CB9 text on black | 4.19:1 | AA large text | Lc -27.3 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E6
oklch(80.9% 0.056 268.2)
-
Step 400
400
#889FD9
oklch(70.7% 0.089 267.5)
-
Step 500
500
#6B86CF
oklch(63.1% 0.115 267.7)
-
Step 600
600 (this color)
#516CB9
oklch(54.7% 0.124 267.6)
-
Step 700
700
#445CA2
oklch(49.1% 0.116 267.8)
-
Step 800
800
#384C83
oklch(42.8% 0.095 267.3)
-
Step 900
900
#303F69
oklch(37.6% 0.075 267.8)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#516CB9 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4B74BC | 0.022 |
| Deuteranopia (no green cones) | #3E6BB7 | 0.022 |
| Tritanopia (no blue cones) | #107D89 | 0.112 |
| Achromatopsia (no color) | #6F6F6F | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516CB9
#516CB9
oklch(54.7% 0.124 267.6)
- #8C6C00
#8C6C00
oklch(54.8% 0.112 88.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #516CB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.026
- Windows Blue #3778BF ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.042
- Mid Blue #276AB3 ΔE 0.043
- Muted Blue #3B719F ΔE 0.053
- Iris #6258C4 ΔE 0.058
- Dull Blue #49759C ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
Use #516CB9 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.