#516B7B
Closest named color: Slate (#516572). oklch(51.3% 0.04 235.6), rgb(81, 107, 123).
Aa
White text reads best on this color (5.61:1).
About this color
#516B7B is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.040 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.020 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.73:1 |
| White text | 5.61:1 |
Values
| HEX | #516B7B |
| RGB | rgb(81, 107, 123) |
| HSL | hsl(203, 21%, 40%) |
| OKLCH | oklch(51.3% 0.04 235.6) |
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 #516B7B | 5.61:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #516B7B | 3.73:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #516B7B text on white | 5.61:1 | AA | Lc 78.1 | Fine for body text |
| #516B7B text on black | 3.73:1 | AA large text | Lc -23.7 | 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
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B5C3CC
oklch(80.9% 0.02 235.8)
-
Step 400
400
#8FA4B1
oklch(70.7% 0.03 235.1)
-
Step 500
500
#738E9E
oklch(63.2% 0.039 234.2)
-
Step 600
600
#5B7889
oklch(55.7% 0.043 234.3)
-
Step 700
700 (this color)
#516B7B
oklch(51.3% 0.04 235.6)
-
Step 800
800
#3E525F
oklch(42.7% 0.033 237)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#516B7B 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) | #646A7C | 0.026 |
| Deuteranopia (no green cones) | #5E657B | 0.024 |
| Tritanopia (no blue cones) | #436F70 | 0.030 |
| Achromatopsia (no color) | #676767 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516B7B
#516B7B
oklch(51.3% 0.04 235.6)
- #796151
#796151
oklch(51.2% 0.04 55.3)
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 #516B7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.020
- Metallic Blue #4F738E ΔE 0.033
- Dim Gray #696969 ΔE 0.041
- Denim #3B638C ΔE 0.050
- Battleship Gray #6C757D ΔE 0.050
- Dull Blue #49759C ΔE 0.052
- Muted Blue #3B719F ΔE 0.057
- YInMn Blue #415A77 ΔE 0.058
Use #516B7B 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.