#573388
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.137 299.9), rgb(87, 51, 136).
Aa
White text reads best on this color (9.39:1).
About this color
#573388 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.137 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.39:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #573388 |
| RGB | rgb(87, 51, 136) |
| HSL | hsl(265, 45%, 37%) |
| OKLCH | oklch(41% 0.137 299.9) |
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 #573388 | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #573388 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #573388 text on white | 9.39:1 | AAA | Lc 91.3 | Preferred for body text |
| #573388 text on black | 2.23:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F3
oklch(88.5% 0.045 299.7)
-
Step 300
300
#C8B5ED
oklch(80.8% 0.08 300.1)
-
Step 400
400
#AD8DE4
oklch(70.7% 0.128 300.1)
-
Step 500
500
#9A6EDC
oklch(63.1% 0.163 300.2)
-
Step 600
600
#8553CA
oklch(55.6% 0.178 300)
-
Step 700
700
#7143AF
oklch(49.2% 0.166 299.9)
-
Step 800
800 (this color)
#573388
oklch(41% 0.137 299.9)
-
Step 900
900
#4B3171
oklch(37.7% 0.107 300)
-
Step 950
950
#2C1D42
oklch(26.9% 0.068 300.6)
#573388 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) | #00468B | 0.103 |
| Deuteranopia (no green cones) | #154686 | 0.096 |
| Tritanopia (no blue cones) | #4C4558 | 0.104 |
| Achromatopsia (no color) | #464646 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573388
#573388
oklch(41% 0.137 299.9)
- #445100
#445100
oklch(40.9% 0.097 119.7)
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 #573388, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Rebecca Purple #663399 ΔE 0.039
- Blueberry #464196 ΔE 0.047
- Twilight #4E518B ΔE 0.077
- Chrysanthemum #560BAD ΔE 0.081
- Indigo #4B0082 ΔE 0.083
- Imperial Purple #480CA8 ΔE 0.085
- Dusk #4E5481 ΔE 0.090
Use #573388 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.