#552B77
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.127 306.8), rgb(85, 43, 119).
Aa
White text reads best on this color (10.50:1).
About this color
#552B77 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.127 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 0.055 away. White text reads best on it, at 10.50:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #552B77 |
| RGB | rgb(85, 43, 119) |
| HSL | hsl(273, 47%, 32%) |
| OKLCH | oklch(38.3% 0.127 306.8) |
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 #552B77 | 10.50:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #552B77 | 1.99:1 | Fails | Lc 10.0 | Not readable |
| #552B77 text on white | 10.50:1 | AAA | Lc 93.9 | Preferred for body text |
| #552B77 text on black | 1.99:1 | Fails | Lc -8.6 | 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
#EEE5F9
oklch(93.5% 0.028 306)
-
Step 200
200
#E2D1F5
oklch(88.6% 0.052 306.6)
-
Step 300
300
#D1B1F1
oklch(81% 0.095 307.2)
-
Step 400
400
#B985EA
oklch(70.7% 0.152 306.6)
-
Step 500
500
#A861E4
oklch(63% 0.196 306.6)
-
Step 600
600
#9443D2
oklch(55.7% 0.212 306.7)
-
Step 700
700
#7E33B6
oklch(49.1% 0.197 306.6)
-
Step 800
800
#672C93
oklch(42.8% 0.163 307)
-
Step 900
900 (this color)
#552B77
oklch(38.3% 0.127 306.8)
-
Step 950
950
#311945
oklch(27% 0.082 306.9)
#552B77 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) | #053E79 | 0.108 |
| Deuteranopia (no green cones) | #1D3F75 | 0.096 |
| Tritanopia (no blue cones) | #503A4C | 0.092 |
| Achromatopsia (no color) | #3F3F3F | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #552B77
#552B77
oklch(38.3% 0.127 306.8)
- #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 #552B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Rebecca Purple #663399 ΔE 0.067
- Indigo #4B0082 ΔE 0.069
- Royal Purple #4B006E ΔE 0.073
- Blueberry #464196 ΔE 0.073
- Grape Purple #5D1451 ΔE 0.076
- Rich Purple #720058 ΔE 0.092
- Plum Purple #4E0550 ΔE 0.093
Use #552B77 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.