#516A79
Closest named color: Slate (#516572). oklch(51% 0.038 234.8), rgb(81, 106, 121).
Aa
White text reads best on this color (5.69:1).
About this color
#516A79 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.038 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.016 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #516A79 |
| RGB | rgb(81, 106, 121) |
| HSL | hsl(203, 20%, 40%) |
| OKLCH | oklch(51% 0.038 234.8) |
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 #516A79 | 5.69:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #516A79 | 3.68:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #516A79 text on white | 5.69:1 | AA | Lc 78.5 | Fine for body text |
| #516A79 text on black | 3.68:1 | AA large text | Lc -23.3 | 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 700.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B6C3CB
oklch(81% 0.018 234.6)
-
Step 400
400
#90A4B1
oklch(70.7% 0.029 236.4)
-
Step 500
500
#748E9D
oklch(63.2% 0.037 233.5)
-
Step 600
600
#5C7888
oklch(55.7% 0.041 233.5)
-
Step 700
700 (this color)
#516A79
oklch(51% 0.038 234.8)
-
Step 800
800
#3E525E
oklch(42.7% 0.032 234.8)
-
Step 900
900
#35444D
oklch(37.7% 0.025 234.6)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#516A79 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) | #63697A | 0.025 |
| Deuteranopia (no green cones) | #5D6579 | 0.021 |
| Tritanopia (no blue cones) | #446E6F | 0.028 |
| Achromatopsia (no color) | #676767 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516A79
#516A79
oklch(51% 0.038 234.8)
- #786152
#786152
oklch(51.1% 0.038 54.8)
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 #516A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.016
- Metallic Blue #4F738E ΔE 0.036
- Dim Gray #696969 ΔE 0.039
- Denim #3B638C ΔE 0.050
- Battleship Gray #6C757D ΔE 0.052
- YInMn Blue #415A77 ΔE 0.055
- Dull Blue #49759C ΔE 0.056
- Dusty Grape #545775 ΔE 0.056
Use #516A79 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.