#51576B
Closest named color: Dusty Grape (#545775). oklch(45.9% 0.033 271.9), rgb(81, 87, 107).
Aa
White text reads best on this color (7.17:1).
About this color
#51576B is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.033 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.018 away. White text reads best on it, at 7.17:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #51576B |
| RGB | rgb(81, 87, 107) |
| HSL | hsl(226, 14%, 37%) |
| OKLCH | oklch(45.9% 0.033 271.9) |
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 #51576B | 7.17:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #51576B | 2.92:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #51576B text on white | 7.17:1 | AAA | Lc 84.9 | Fine for body text |
| #51576B text on black | 2.92:1 | Fails | Lc -17.1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9DF
oklch(88.6% 0.008 271.3)
-
Step 300
300
#BDC0CB
oklch(80.9% 0.016 273.8)
-
Step 400
400
#9BA0B1
oklch(70.7% 0.025 272.7)
-
Step 500
500
#82899E
oklch(63.2% 0.033 270.9)
-
Step 600
600
#6C7289
oklch(55.5% 0.036 273.7)
-
Step 700
700 (this color)
#51576B
oklch(45.9% 0.033 271.9)
-
Step 800
800
#494E5F
oklch(42.6% 0.029 272.3)
-
Step 900
900
#3D414D
oklch(37.6% 0.021 270.8)
-
Step 950
950
#24262D
oklch(27% 0.013 272.9)
#51576B 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) | #51596C | 0.006 |
| Deuteranopia (no green cones) | #4F566A | 0.005 |
| Tritanopia (no blue cones) | #4B5B5E | 0.030 |
| Achromatopsia (no color) | #575757 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51576B
#51576B
oklch(45.9% 0.033 271.9)
- #5E5843
#5E5843
oklch(46% 0.033 94)
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 #51576B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.018
- YInMn Blue #415A77 ΔE 0.027
- Dusk #4E5481 ΔE 0.040
- Slate #516572 ΔE 0.041
- Denim #3B638C ΔE 0.059
- Light Navy Blue #2E5A88 ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Dusky Blue #475F94 ΔE 0.065
Use #51576B 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.