#51566D
Closest named color: Dusty Grape (#545775). oklch(45.8% 0.038 275.2), rgb(81, 86, 109).
Aa
White text reads best on this color (7.23:1).
About this color
#51566D is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.038 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.014 away. White text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.90:1 |
| White text | 7.23:1 |
Values
| HEX | #51566D |
| RGB | rgb(81, 86, 109) |
| HSL | hsl(229, 15%, 37%) |
| OKLCH | oklch(45.8% 0.038 275.2) |
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 #51566D | 7.23:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #51566D | 2.90:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #51566D text on white | 7.23:1 | AAA | Lc 85.1 | Fine for body text |
| #51566D text on black | 2.90:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BCC0CF
oklch(80.9% 0.021 274)
-
Step 400
400
#9A9FB7
oklch(70.6% 0.035 276.2)
-
Step 500
500
#8188A6
oklch(63.2% 0.046 274.7)
-
Step 600
600
#6B7191
oklch(55.6% 0.05 276.4)
-
Step 700
700
#595F7B
oklch(49.1% 0.046 275.2)
-
Step 800
800 (this color)
#51566D
oklch(45.8% 0.038 275.2)
-
Step 900
900
#3D4152
oklch(37.9% 0.03 274.6)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#51566D 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) | #4F586E | 0.006 |
| Deuteranopia (no green cones) | #4E566C | 0.005 |
| Tritanopia (no blue cones) | #4A5A5E | 0.033 |
| Achromatopsia (no color) | #575757 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51566D
#51566D
oklch(45.8% 0.038 275.2)
- #5E573F
#5E573F
oklch(45.7% 0.038 93.8)
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 #51566D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.014
- YInMn Blue #415A77 ΔE 0.026
- Dusk #4E5481 ΔE 0.036
- Slate #516572 ΔE 0.044
- Twilight #4E518B ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.057
- Denim #3B638C ΔE 0.058
- Dusky Blue #475F94 ΔE 0.063
Use #51566D 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.