#51566F
Closest named color: Dusty Grape (#545775). oklch(45.9% 0.041 275.8), rgb(81, 86, 111).
Aa
White text reads best on this color (7.21:1).
About this color
#51566F is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.041 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.011 away. White text reads best on it, at 7.21:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.91:1 |
| White text | 7.21:1 |
Values
| HEX | #51566F |
| RGB | rgb(81, 86, 111) |
| HSL | hsl(230, 16%, 38%) |
| OKLCH | oklch(45.9% 0.041 275.8) |
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 #51566F | 7.21:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #51566F | 2.91:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #51566F text on white | 7.21:1 | AAA | Lc 85.1 | Fine for body text |
| #51566F text on black | 2.91:1 | Fails | Lc -17.0 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BCC0D1
oklch(81% 0.024 275.3)
-
Step 400
400
#999FB9
oklch(70.6% 0.039 275.1)
-
Step 500
500
#8187A8
oklch(63% 0.05 276.8)
-
Step 600
600
#6A7193
oklch(55.6% 0.054 275.5)
-
Step 700
700
#595F7D
oklch(49.2% 0.049 275.7)
-
Step 800
800 (this color)
#51566F
oklch(45.9% 0.041 275.8)
-
Step 900
900
#3D4053
oklch(37.7% 0.033 277.7)
-
Step 950
950
#242631
oklch(27.1% 0.021 276.9)
#51566F 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) | #4F5870 | 0.006 |
| Deuteranopia (no green cones) | #4D566E | 0.006 |
| Tritanopia (no blue cones) | #4A5B5E | 0.038 |
| Achromatopsia (no color) | #575757 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51566F
#51566F
oklch(45.9% 0.041 275.8)
- #5E583D
#5E583D
oklch(45.9% 0.042 97.1)
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 #51566F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.011
- YInMn Blue #415A77 ΔE 0.025
- Dusk #4E5481 ΔE 0.032
- Slate #516572 ΔE 0.045
- Twilight #4E518B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.055
- Denim #3B638C ΔE 0.056
- Dusky Blue #475F94 ΔE 0.060
Use #51566F 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.