#552D73
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.119 308.1), rgb(85, 45, 115).
Aa
White text reads best on this color (10.45:1).
About this color
#552D73 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.119 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 10.45:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.119) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #552D73 |
| RGB | rgb(85, 45, 115) |
| HSL | hsl(274, 44%, 31%) |
| OKLCH | oklch(38.3% 0.119 308.1) |
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 #552D73 | 10.45:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #552D73 | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #552D73 text on white | 10.45:1 | AAA | Lc 93.9 | Preferred for body text |
| #552D73 text on black | 2.00:1 | Fails | Lc -8.7 | 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
#F8F3FC
oklch(97.1% 0.013 310.5)
-
Step 100
100
#EFE6F8
oklch(93.7% 0.026 308.2)
-
Step 200
200
#E2D1F3
oklch(88.5% 0.049 307.8)
-
Step 300
300
#D1B1EE
oklch(80.9% 0.091 308.3)
-
Step 400
400
#B986E5
oklch(70.6% 0.144 307.8)
-
Step 500
500
#A864DD
oklch(63% 0.183 307.9)
-
Step 600
600
#9447CA
oklch(55.6% 0.199 308.3)
-
Step 700
700
#7E37AF
oklch(49.1% 0.185 308.1)
-
Step 800
800
#662F8E
oklch(42.7% 0.153 307.8)
-
Step 900
900 (this color)
#552D73
oklch(38.3% 0.119 308.1)
-
Step 950
950
#311A42
oklch(27% 0.076 308.7)
#552D73 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) | #133E75 | 0.100 |
| Deuteranopia (no green cones) | #234071 | 0.090 |
| Tritanopia (no blue cones) | #513A4B | 0.085 |
| Achromatopsia (no color) | #3F3F3F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552D73
#552D73
oklch(38.3% 0.119 308.1)
- #334D00
#334D00
oklch(38.4% 0.101 128.4)
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 #552D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.071
- Grape Purple #5D1451 ΔE 0.072
- Blueberry #464196 ΔE 0.075
- Indigo #4B0082 ΔE 0.076
- Royal Purple #4B006E ΔE 0.077
- Rich Purple #720058 ΔE 0.090
- Plum Purple #4E0550 ΔE 0.092
Use #552D73 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.