#516F77
Closest named color: Slate (#516572). oklch(52.1% 0.037 216), rgb(81, 111, 119).
Aa
White text reads best on this color (5.39:1).
About this color
#516F77 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.037 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 5.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #516F77 |
| RGB | rgb(81, 111, 119) |
| HSL | hsl(193, 19%, 39%) |
| OKLCH | oklch(52.1% 0.037 216) |
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 #516F77 | 5.39:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #516F77 | 3.89:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #516F77 text on white | 5.39:1 | AA | Lc 76.9 | Fine for body text |
| #516F77 text on black | 3.89:1 | AA large text | Lc -24.9 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDD
oklch(88.5% 0.01 212.5)
-
Step 300
300
#B4C4C8
oklch(80.9% 0.018 214.4)
-
Step 400
400
#8DA5AC
oklch(70.6% 0.029 217.3)
-
Step 500
500
#718F98
oklch(63% 0.036 218)
-
Step 600
600
#597A82
oklch(55.7% 0.039 214.3)
-
Step 700
700 (this color)
#516F77
oklch(52.1% 0.037 216)
-
Step 800
800
#3C535A
oklch(42.6% 0.03 218.5)
-
Step 900
900
#33454A
oklch(37.7% 0.024 216.7)
-
Step 950
950
#1E282B
oklch(26.9% 0.015 218)
#516F77 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) | #696D77 | 0.033 |
| Deuteranopia (no green cones) | #636877 | 0.031 |
| Tritanopia (no blue cones) | #447271 | 0.022 |
| Achromatopsia (no color) | #6A6A6A | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516F77
#516F77
oklch(52.1% 0.037 216)
- #7D625B
#7D625B
oklch(52.1% 0.037 35)
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 #516F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Metallic Blue #4F738E ΔE 0.035
- Dim Gray #696969 ΔE 0.037
- Battleship Gray #6C757D ΔE 0.043
- Deep Aqua #08787F ΔE 0.052
- Deep Turquoise #017374 ΔE 0.055
- Battleship Grey #6B7C85 ΔE 0.056
- Dull Blue #49759C ΔE 0.056
Use #516F77 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.