#552F73
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.116 307.7), rgb(85, 47, 115).
Aa
White text reads best on this color (10.29:1).
About this color
#552F73 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.116 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 0.054 away. White text reads best on it, at 10.29:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.29:1 |
Values
| HEX | #552F73 |
| RGB | rgb(85, 47, 115) |
| HSL | hsl(274, 42%, 32%) |
| OKLCH | oklch(38.6% 0.116 307.7) |
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 #552F73 | 10.29:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #552F73 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #552F73 text on white | 10.29:1 | AAA | Lc 93.6 | Preferred for body text |
| #552F73 text on black | 2.04:1 | Fails | Lc -9.0 | 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 900.
-
Step 50
50
#F7F3FC
oklch(97% 0.013 306)
-
Step 100
100
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E2D1F2
oklch(88.5% 0.048 308.5)
-
Step 300
300
#D0B2ED
oklch(80.9% 0.088 307.6)
-
Step 400
400
#B887E3
oklch(70.6% 0.139 307.7)
-
Step 500
500
#A766DB
oklch(63.1% 0.178 307.7)
-
Step 600
600
#9249C8
oklch(55.5% 0.193 307.7)
-
Step 700
700
#7D3AAD
oklch(49.2% 0.179 307.9)
-
Step 800
800
#65318C
oklch(42.7% 0.148 307.6)
-
Step 900
900 (this color)
#552F73
oklch(38.6% 0.116 307.7)
-
Step 950
950
#301B42
oklch(27% 0.073 307)
#552F73 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) | #173F75 | 0.096 |
| Deuteranopia (no green cones) | #254171 | 0.086 |
| Tritanopia (no blue cones) | #503C4C | 0.084 |
| Achromatopsia (no color) | #404040 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552F73
#552F73
oklch(38.6% 0.116 307.7)
- #354D00
#354D00
oklch(38.6% 0.1 127.3)
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 #552F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Rebecca Purple #663399 ΔE 0.070
- Blueberry #464196 ΔE 0.073
- Grape Purple #5D1451 ΔE 0.075
- Indigo #4B0082 ΔE 0.081
- Royal Purple #4B006E ΔE 0.081
- Twilight #4E518B ΔE 0.092
- Rich Purple #720058 ΔE 0.092
Use #552F73 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.