#55318B
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.143 298.2), rgb(85, 49, 139).
Aa
White text reads best on this color (9.55:1).
About this color
#55318B is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.143 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.55:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #55318B |
| RGB | rgb(85, 49, 139) |
| HSL | hsl(264, 48%, 37%) |
| OKLCH | oklch(40.7% 0.143 298.2) |
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 #55318B | 9.55:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #55318B | 2.19:1 | Fails | Lc 12.3 | Not readable |
| #55318B text on white | 9.55:1 | AAA | Lc 91.7 | Preferred for body text |
| #55318B text on black | 2.19:1 | Fails | Lc -10.7 | 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 800.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DCD3F5
oklch(88.5% 0.047 297.5)
-
Step 300
300
#C7B5F0
oklch(80.8% 0.084 298.5)
-
Step 400
400
#AB8DE9
oklch(70.7% 0.134 297.9)
-
Step 500
500
#986DE2
oklch(63.1% 0.172 298.3)
-
Step 600
600
#8352CF
oklch(55.6% 0.185 298.2)
-
Step 700
700
#6F42B4
oklch(49.2% 0.173 297.9)
-
Step 800
800 (this color)
#55318B
oklch(40.7% 0.143 298.2)
-
Step 900
900
#4A3174
oklch(37.8% 0.111 298.1)
-
Step 950
950
#2B1D44
oklch(27% 0.071 298)
#55318B 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) | #00458E | 0.101 |
| Deuteranopia (no green cones) | #034489 | 0.101 |
| Tritanopia (no blue cones) | #484559 | 0.110 |
| Achromatopsia (no color) | #454545 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55318B
#55318B
oklch(40.7% 0.143 298.2)
- #455000
#455000
oklch(40.7% 0.095 118.4)
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 #55318B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Rebecca Purple #663399 ΔE 0.040
- Blueberry #464196 ΔE 0.046
- Chrysanthemum #560BAD ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.077
- Indigo #4B0082 ΔE 0.078
- Twilight #4E518B ΔE 0.081
- Cobalt #1E488F ΔE 0.089
Use #55318B 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.