#552A78
Closest named color: Dark Slate Blue (#483D8B). oklch(38.2% 0.13 306.6), rgb(85, 42, 120).
Aa
White text reads best on this color (10.55:1).
About this color
#552A78 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.130 and its hue 307°. 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 10.55:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.55:1 |
Values
| HEX | #552A78 |
| RGB | rgb(85, 42, 120) |
| HSL | hsl(273, 48%, 32%) |
| OKLCH | oklch(38.2% 0.13 306.6) |
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 #552A78 | 10.55:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #552A78 | 1.98:1 | Fails | Lc 9.9 | Not readable |
| #552A78 text on white | 10.55:1 | AAA | Lc 94.0 | Preferred for body text |
| #552A78 text on black | 1.98:1 | Fails | Lc -8.5 | 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
#F8F3FD
oklch(97.1% 0.014 308.3)
-
Step 100
100
#EFE5F9
oklch(93.6% 0.029 308.1)
-
Step 200
200
#E2D0F6
oklch(88.4% 0.055 306.7)
-
Step 300
300
#D1B0F3
oklch(80.9% 0.099 306.8)
-
Step 400
400
#BA84EC
oklch(70.7% 0.156 306.8)
-
Step 500
500
#A960E6
oklch(63.1% 0.2 306.7)
-
Step 600
600
#9441D4
oklch(55.6% 0.217 306.4)
-
Step 700
700
#7F31B8
oklch(49.2% 0.202 306.6)
-
Step 800
800
#672A95
oklch(42.7% 0.168 306.6)
-
Step 900
900 (this color)
#552A78
oklch(38.2% 0.13 306.6)
-
Step 950
950
#311945
oklch(27% 0.082 306.9)
#552A78 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) | #003D7A | 0.111 |
| Deuteranopia (no green cones) | #1A3F76 | 0.099 |
| Tritanopia (no blue cones) | #4F3A4D | 0.093 |
| Achromatopsia (no color) | #3F3F3F | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552A78
#552A78
oklch(38.2% 0.13 306.6)
- #354C00
#354C00
oklch(38.3% 0.099 126.8)
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 #552A78, 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 0.066
- Indigo #4B0082 ΔE 0.067
- Royal Purple #4B006E ΔE 0.071
- Blueberry #464196 ΔE 0.074
- Grape Purple #5D1451 ΔE 0.076
- Rich Purple #720058 ΔE 0.092
- Plum Purple #4E0550 ΔE 0.092
Use #552A78 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.