#516CAF
Closest named color: French Blue (#436BAD). oklch(54.1% 0.11 266.2), rgb(81, 108, 175).
Aa
White text reads best on this color (5.10:1).
About this color
#516CAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.110 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #516CAF |
| RGB | rgb(81, 108, 175) |
| HSL | hsl(223, 37%, 50%) |
| OKLCH | oklch(54.1% 0.11 266.2) |
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 #516CAF | 5.10:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #516CAF | 4.11:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #516CAF text on white | 5.10:1 | AA | Lc 75.1 | Fine for body text |
| #516CAF text on black | 4.11:1 | AA large text | Lc -26.6 | 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
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D1D9EC
oklch(88.5% 0.028 267.5)
-
Step 300
300
#B2C1E2
oklch(81% 0.05 266)
-
Step 400
400
#8AA0D3
oklch(70.8% 0.079 266.3)
-
Step 500
500
#6D87C7
oklch(63% 0.102 266.7)
-
Step 600
600 (this color)
#516CAF
oklch(54.1% 0.11 266.2)
-
Step 700
700
#455E9B
oklch(49.1% 0.103 265.9)
-
Step 800
800
#394D7D
oklch(42.7% 0.084 265.8)
-
Step 900
900
#314065
oklch(37.6% 0.067 266.5)
-
Step 950
950
#1D263B
oklch(27.1% 0.041 266)
#516CAF 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) | #5173B2 | 0.019 |
| Deuteranopia (no green cones) | #466AAE | 0.015 |
| Tritanopia (no blue cones) | #217B85 | 0.099 |
| Achromatopsia (no color) | #6E6E6E | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516CAF
#516CAF
oklch(54.1% 0.11 266.2)
- #8B6903
#8B6903
oklch(54% 0.11 86)
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 #516CAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.032
- Muted Blue #3B719F ΔE 0.040
- Windows Blue #3778BF ΔE 0.041
- Mid Blue #276AB3 ΔE 0.041
- Dull Blue #49759C ΔE 0.045
- Dusky Blue #475F94 ΔE 0.054
- Nice Blue #107AB0 ΔE 0.056
Use #516CAF 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.