#551755
Closest named color: Grape Purple (#5D1451). oklch(33.3% 0.121 327.9), rgb(85, 23, 85).
Aa
White text reads best on this color (12.80:1).
About this color
#551755 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.121 and its hue 328°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.019 away. White text reads best on it, at 12.80:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.63:1 |
| White text | 12.80:1 |
Values
| HEX | #551755 |
| RGB | rgb(85, 23, 85) |
| HSL | hsl(300, 57%, 21%) |
| OKLCH | oklch(33.3% 0.121 327.9) |
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 #551755 | 12.80:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #551755 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #551755 text on white | 12.80:1 | AAA | Lc 98.1 | Preferred for body text |
| #551755 text on black | 1.63:1 | Fails | Lc 0.0 | 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
#FAF3FA
oklch(97.2% 0.012 325.7)
-
Step 100
100
#F4E4F3
oklch(93.6% 0.026 327.7)
-
Step 200
200
#ECCEEA
oklch(88.5% 0.05 328.1)
-
Step 300
300
#E1ACDF
oklch(80.9% 0.091 327.6)
-
Step 400
400
#D07DCE
oklch(70.6% 0.146 327.8)
-
Step 500
500
#C258C1
oklch(63% 0.186 327.9)
-
Step 600
600
#AE38AE
oklch(55.6% 0.203 327.9)
-
Step 700
700
#952995
oklch(49.1% 0.188 328)
-
Step 800
800
#792479
oklch(42.7% 0.156 327.9)
-
Step 900
900 (this color)
#551755
oklch(33.3% 0.121 327.9)
-
Step 950
950
#3A1639
oklch(27% 0.077 328.5)
#551755 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) | #0E2D57 | 0.127 |
| Deuteranopia (no green cones) | #273553 | 0.109 |
| Tritanopia (no blue cones) | #582034 | 0.068 |
| Achromatopsia (no color) | #323232 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #551755
#551755
oklch(33.3% 0.121 327.9)
- #004315
#004315
oklch(33.4% 0.097 147.7)
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 #551755, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.019
- Plum Purple #4E0550 ΔE 0.033
- Deep Violet #490648 ΔE 0.045
- Royal Purple #4B006E ΔE 0.062
- Eggplant Purple #430541 ΔE 0.062
- Rich Purple #720058 ΔE 0.064
- Velvet #750851 ΔE 0.070
- Merlot #730039 ΔE 0.083
Use #551755 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.