#573170
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.109 310.1), rgb(87, 49, 112).
Aa
White text reads best on this color (10.10:1).
About this color
#573170 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.109 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 10.10:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #573170 |
| RGB | rgb(87, 49, 112) |
| HSL | hsl(276, 39%, 32%) |
| OKLCH | oklch(39% 0.109 310.1) |
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 #573170 | 10.10:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #573170 | 2.07:1 | Fails | Lc 10.8 | Not readable |
| #573170 text on white | 10.10:1 | AAA | Lc 93.2 | Preferred for body text |
| #573170 text on black | 2.07:1 | Fails | Lc -9.3 | Not readable |
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 900.
-
Step 50
50
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EFE6F6
oklch(93.7% 0.023 310.7)
-
Step 200
200
#E2D1F0
oklch(88.4% 0.046 309.9)
-
Step 300
300
#D1B2E9
oklch(80.9% 0.083 310.1)
-
Step 400
400
#BA88DD
oklch(70.7% 0.131 310.4)
-
Step 500
500
#A868D4
oklch(63.1% 0.167 309.8)
-
Step 600
600
#944CC1
oklch(55.7% 0.182 310.2)
-
Step 700
700
#7E3CA7
oklch(49.2% 0.17 310)
-
Step 800
800
#663287
oklch(42.6% 0.141 309.9)
-
Step 900
900 (this color)
#573170
oklch(39% 0.109 310.1)
-
Step 950
950
#311B3F
oklch(27% 0.069 310.8)
#573170 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) | #1F4072 | 0.091 |
| Deuteranopia (no green cones) | #2B426E | 0.082 |
| Tritanopia (no blue cones) | #543C4B | 0.077 |
| Achromatopsia (no color) | #424242 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573170
#573170
oklch(39% 0.109 310.1)
- #314F00
#314F00
oklch(38.9% 0.105 130.2)
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 #573170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Rebecca Purple #663399 ΔE 0.073
- Grape Purple #5D1451 ΔE 0.073
- Blueberry #464196 ΔE 0.075
- Royal Purple #4B006E ΔE 0.088
- Twilight #4E518B ΔE 0.089
- Indigo #4B0082 ΔE 0.089
- Rich Purple #720058 ΔE 0.090
Use #573170 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.