#516C7D
Closest named color: Slate (#516572). oklch(51.6% 0.042 236.3), rgb(81, 108, 125).
Aa
White text reads best on this color (5.53:1).
About this color
#516C7D is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.042 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.023 away. White text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.79:1 |
| White text | 5.53:1 |
Values
| HEX | #516C7D |
| RGB | rgb(81, 108, 125) |
| HSL | hsl(203, 21%, 40%) |
| OKLCH | oklch(51.6% 0.042 236.3) |
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 #516C7D | 5.53:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #516C7D | 3.79:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #516C7D text on white | 5.53:1 | AA | Lc 77.6 | Fine for body text |
| #516C7D text on black | 3.79:1 | AA large text | Lc -24.1 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D2DAE0
oklch(88.4% 0.012 239.9)
-
Step 300
300
#B5C3CC
oklch(80.9% 0.02 235.8)
-
Step 400
400
#8EA4B2
oklch(70.6% 0.032 235.9)
-
Step 500
500
#728E9F
oklch(63.1% 0.041 234.9)
-
Step 600
600
#5A788A
oklch(55.6% 0.044 235)
-
Step 700
700 (this color)
#516C7D
oklch(51.6% 0.042 236.3)
-
Step 800
800
#3D5260
oklch(42.7% 0.035 237.8)
-
Step 900
900
#34444E
oklch(37.7% 0.027 235.9)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#516C7D 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) | #646B7E | 0.026 |
| Deuteranopia (no green cones) | #5E667D | 0.024 |
| Tritanopia (no blue cones) | #427071 | 0.032 |
| Achromatopsia (no color) | #686868 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516C7D
#516C7D
oklch(51.6% 0.042 236.3)
- #7B6251
#7B6251
oklch(51.6% 0.042 55.8)
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 #516C7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.023
- Metallic Blue #4F738E ΔE 0.029
- Dim Gray #696969 ΔE 0.042
- Battleship Gray #6C757D ΔE 0.048
- Dull Blue #49759C ΔE 0.049
- Denim #3B638C ΔE 0.050
- Muted Blue #3B719F ΔE 0.055
- Stormy Blue #507B9C ΔE 0.057
Use #516C7D 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.