#516C7F
Closest named color: Slate (#516572). oklch(51.7% 0.044 239.4), rgb(81, 108, 127).
Aa
White text reads best on this color (5.52:1).
About this color
#516C7F is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.044 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #516C7F |
| RGB | rgb(81, 108, 127) |
| HSL | hsl(205, 22%, 41%) |
| OKLCH | oklch(51.7% 0.044 239.4) |
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 #516C7F | 5.52:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #516C7F | 3.80:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #516C7F text on white | 5.52:1 | AA | Lc 77.6 | Fine for body text |
| #516C7F text on black | 3.80:1 | AA large text | Lc -24.2 | 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
#B5C3CD
oklch(80.9% 0.021 238.7)
-
Step 400
400
#8EA4B4
oklch(70.7% 0.034 239.6)
-
Step 500
500
#728EA1
oklch(63.2% 0.043 238)
-
Step 600
600
#5A788C
oklch(55.7% 0.047 237.9)
-
Step 700
700 (this color)
#516C7F
oklch(51.7% 0.044 239.4)
-
Step 800
800
#3D5261
oklch(42.7% 0.036 239.7)
-
Step 900
900
#34444F
oklch(37.7% 0.028 238.5)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#516C7F 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) | #646B80 | 0.026 |
| Deuteranopia (no green cones) | #5E667F | 0.024 |
| Tritanopia (no blue cones) | #427172 | 0.035 |
| Achromatopsia (no color) | #696969 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516C7F
#516C7F
oklch(51.7% 0.044 239.4)
- #7C624F
#7C624F
oklch(51.7% 0.044 57.7)
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 #516C7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Metallic Blue #4F738E ΔE 0.027
- Dim Gray #696969 ΔE 0.044
- Dull Blue #49759C ΔE 0.046
- Denim #3B638C ΔE 0.048
- Battleship Gray #6C757D ΔE 0.049
- Muted Blue #3B719F ΔE 0.052
- Stormy Blue #507B9C ΔE 0.055
Use #516C7F 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.