#516CB5
Closest named color: French Blue (#436BAD). oklch(54.5% 0.119 267.1), rgb(81, 108, 181).
Aa
White text reads best on this color (5.04:1).
About this color
#516CB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.119 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.021 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #516CB5 |
| RGB | rgb(81, 108, 181) |
| HSL | hsl(224, 40%, 51%) |
| OKLCH | oklch(54.5% 0.119 267.1) |
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 #516CB5 | 5.04:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #516CB5 | 4.16:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #516CB5 text on white | 5.04:1 | AA | Lc 74.7 | Content text, not long reading |
| #516CB5 text on black | 4.16:1 | AA large text | Lc -27.0 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C0E4
oklch(80.8% 0.054 267.4)
-
Step 400
400
#899FD7
oklch(70.7% 0.086 267.6)
-
Step 500
500
#6C87CC
oklch(63.2% 0.109 267)
-
Step 600
600 (this color)
#516CB5
oklch(54.5% 0.119 267.1)
-
Step 700
700
#455D9F
oklch(49.2% 0.11 267.3)
-
Step 800
800
#384C81
oklch(42.7% 0.092 266.9)
-
Step 900
900
#314067
oklch(37.8% 0.07 267.1)
-
Step 950
950
#1C263D
oklch(27.1% 0.045 265.6)
#516CB5 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) | #4E74B8 | 0.021 |
| Deuteranopia (no green cones) | #426BB3 | 0.018 |
| Tritanopia (no blue cones) | #187C88 | 0.106 |
| Achromatopsia (no color) | #6F6F6F | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516CB5
#516CB5
oklch(54.5% 0.119 267.1)
- #8C6B00
#8C6B00
oklch(54.6% 0.112 87.2)
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 #516CB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.038
- Windows Blue #3778BF ΔE 0.038
- Mid Blue #276AB3 ΔE 0.042
- Muted Blue #3B719F ΔE 0.047
- Dull Blue #49759C ΔE 0.053
- Nice Blue #107AB0 ΔE 0.058
- Dusky Blue #475F94 ΔE 0.061
Use #516CB5 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.