#516B8B
Closest named color: Metallic Blue (#4F738E). oklch(52% 0.06 254), rgb(81, 107, 139).
Aa
White text reads best on this color (5.48:1).
About this color
#516B8B is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.060 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.023 away. White text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #516B8B |
| RGB | rgb(81, 107, 139) |
| HSL | hsl(213, 26%, 43%) |
| OKLCH | oklch(52% 0.06 254) |
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 #516B8B | 5.48:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #516B8B | 3.82:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #516B8B text on white | 5.48:1 | AA | Lc 77.4 | Fine for body text |
| #516B8B text on black | 3.82:1 | AA large text | Lc -24.4 | 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 700.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D3
oklch(80.9% 0.029 253.3)
-
Step 400
400
#8DA3BD
oklch(70.7% 0.045 252.7)
-
Step 500
500
#718CAD
oklch(63.2% 0.059 253.7)
-
Step 600
600
#597598
oklch(55.5% 0.064 254.3)
-
Step 700
700 (this color)
#516B8B
oklch(52% 0.06 254)
-
Step 800
800
#3C516A
oklch(42.8% 0.049 253.2)
-
Step 900
900
#334356
oklch(37.7% 0.039 253.1)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#516B8B 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) | #5F6C8C | 0.019 |
| Deuteranopia (no green cones) | #58668A | 0.016 |
| Tritanopia (no blue cones) | #3C7276 | 0.052 |
| Achromatopsia (no color) | #696969 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516B8B
#516B8B
oklch(52% 0.06 254)
- #7E6442
#7E6442
oklch(52.1% 0.059 73.4)
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 #516B8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.023
- Dull Blue #49759C ΔE 0.034
- Muted Blue #3B719F ΔE 0.037
- Denim #3B638C ΔE 0.038
- Slate #516572 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.045
- Cerulean #457B9D ΔE 0.048
- Stormy Blue #507B9C ΔE 0.048
Use #516B8B 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.