#516E8A
Closest named color: Metallic Blue (#4F738E). oklch(52.7% 0.056 248), rgb(81, 110, 138).
Aa
White text reads best on this color (5.32:1).
About this color
#516E8A is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.056 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.014 away. White text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #516E8A |
| RGB | rgb(81, 110, 138) |
| HSL | hsl(209, 26%, 43%) |
| OKLCH | oklch(52.7% 0.056 248) |
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 #516E8A | 5.32:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #516E8A | 3.94:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #516E8A text on white | 5.32:1 | AA | Lc 76.4 | Fine for body text |
| #516E8A text on black | 3.94:1 | AA large text | Lc -25.3 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C2D0
oklch(80.8% 0.025 248.1)
-
Step 400
400
#8DA3B9
oklch(70.6% 0.041 248.4)
-
Step 500
500
#718DA8
oklch(63.2% 0.052 247.7)
-
Step 600
600 (this color)
#516E8A
oklch(52.7% 0.056 248)
-
Step 700
700
#49647D
oklch(49.2% 0.051 247)
-
Step 800
800
#3C5166
oklch(42.6% 0.044 248.9)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1E2730
oklch(26.8% 0.021 248.6)
#516E8A 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) | #636E8B | 0.024 |
| Deuteranopia (no green cones) | #5C6989 | 0.019 |
| Tritanopia (no blue cones) | #3C7477 | 0.047 |
| Achromatopsia (no color) | #6B6B6B | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516E8A
#516E8A
oklch(52.7% 0.056 248)
- #816547
#816547
oklch(52.7% 0.057 68)
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 #516E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.014
- Dull Blue #49759C ΔE 0.030
- Muted Blue #3B719F ΔE 0.037
- Slate #516572 ΔE 0.041
- Stormy Blue #507B9C ΔE 0.041
- Cerulean #457B9D ΔE 0.041
- Denim #3B638C ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.049
Use #516E8A 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.