#516B78
Closest named color: Slate (#516572). oklch(51.2% 0.037 230), rgb(81, 107, 120).
Aa
White text reads best on this color (5.63:1).
About this color
#516B78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.037 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.018 away. White text reads best on it, at 5.63:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #516B78 |
| RGB | rgb(81, 107, 120) |
| HSL | hsl(200, 19%, 39%) |
| OKLCH | oklch(51.2% 0.037 230) |
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 #516B78 | 5.63:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #516B78 | 3.72:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #516B78 text on white | 5.63:1 | AA | Lc 78.2 | Fine for body text |
| #516B78 text on black | 3.72:1 | AA large text | Lc -23.6 | 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 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
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3CA
oklch(80.9% 0.017 231)
-
Step 400
400
#8FA4AF
oklch(70.6% 0.029 230.6)
-
Step 500
500
#738E9C
oklch(63.1% 0.037 230.6)
-
Step 600
600
#5C7886
oklch(55.6% 0.039 229.9)
-
Step 700
700 (this color)
#516B78
oklch(51.2% 0.037 230)
-
Step 800
800
#3E525D
oklch(42.6% 0.031 232.5)
-
Step 900
900
#35444C
oklch(37.7% 0.024 231.5)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#516B78 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) | #656A79 | 0.028 |
| Deuteranopia (no green cones) | #5F6578 | 0.025 |
| Tritanopia (no blue cones) | #446F6F | 0.027 |
| Achromatopsia (no color) | #676767 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516B78
#516B78
oklch(51.2% 0.037 230)
- #796154
#796154
oklch(51.3% 0.037 50)
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 #516B78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.018
- Metallic Blue #4F738E ΔE 0.036
- Dim Gray #696969 ΔE 0.038
- Battleship Gray #6C757D ΔE 0.050
- Denim #3B638C ΔE 0.053
- Dull Blue #49759C ΔE 0.056
- Deep Aqua #08787F ΔE 0.058
- YInMn Blue #415A77 ΔE 0.059
Use #516B78 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.