#552D78
Closest named color: Dark Slate Blue (#483D8B). oklch(38.7% 0.125 305.9), rgb(85, 45, 120).
Aa
White text reads best on this color (10.33:1).
About this color
#552D78 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.125 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 10.33:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #552D78 |
| RGB | rgb(85, 45, 120) |
| HSL | hsl(272, 45%, 32%) |
| OKLCH | oklch(38.7% 0.125 305.9) |
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 #552D78 | 10.33:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #552D78 | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #552D78 text on white | 10.33:1 | AAA | Lc 93.6 | Preferred for body text |
| #552D78 text on black | 2.03:1 | Fails | Lc -8.9 | 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
#EEE6F9
oklch(93.7% 0.027 304.8)
-
Step 200
200
#E1D1F5
oklch(88.5% 0.052 305.4)
-
Step 300
300
#CFB1F1
oklch(80.8% 0.094 305.8)
-
Step 400
400
#B886EA
oklch(70.8% 0.15 306)
-
Step 500
500
#A763E4
oklch(63.2% 0.193 306)
-
Step 600
600
#9245D1
oklch(55.6% 0.208 305.9)
-
Step 700
700
#7D35B5
oklch(49.2% 0.194 306.2)
-
Step 800
800
#652D93
oklch(42.7% 0.161 305.8)
-
Step 900
900 (this color)
#552D78
oklch(38.7% 0.125 305.9)
-
Step 950
950
#301A45
oklch(27.1% 0.079 305.3)
#552D78 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) | #0A3F7A | 0.104 |
| Deuteranopia (no green cones) | #1E4076 | 0.093 |
| Tritanopia (no blue cones) | #4F3C4E | 0.091 |
| Achromatopsia (no color) | #404040 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552D78
#552D78
oklch(38.7% 0.125 305.9)
- #374D00
#374D00
oklch(38.7% 0.099 126.1)
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 #552D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Rebecca Purple #663399 ΔE 0.064
- Blueberry #464196 ΔE 0.069
- Indigo #4B0082 ΔE 0.073
- Royal Purple #4B006E ΔE 0.077
- Grape Purple #5D1451 ΔE 0.079
- Twilight #4E518B ΔE 0.094
- Rich Purple #720058 ΔE 0.094
Use #552D78 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.