#5B3D8B
Closest named color: Dark Slate Blue (#483D8B). oklch(43.3% 0.126 298.8), rgb(91, 61, 139).
Aa
White text reads best on this color (8.45:1).
About this color
#5B3D8B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.126 and its hue 299°. 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 8.45:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #5B3D8B |
| RGB | rgb(91, 61, 139) |
| HSL | hsl(263, 39%, 39%) |
| OKLCH | oklch(43.3% 0.126 298.8) |
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 #5B3D8B | 8.45:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #5B3D8B | 2.48:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #5B3D8B text on white | 8.45:1 | AAA | Lc 88.8 | Fine for body text |
| #5B3D8B text on black | 2.48:1 | Fails | Lc -13.4 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DCD4F1
oklch(88.5% 0.04 298.2)
-
Step 300
300
#C7B7EA
oklch(81% 0.073 299.1)
-
Step 400
400
#AA90E0
oklch(70.7% 0.117 298.3)
-
Step 500
500
#9772D7
oklch(63.2% 0.15 298.9)
-
Step 600
600
#8258C4
oklch(55.6% 0.163 299)
-
Step 700
700
#6E47A9
oklch(49.1% 0.152 299.1)
-
Step 800
800 (this color)
#5B3D8B
oklch(43.3% 0.126 298.8)
-
Step 900
900
#49346E
oklch(37.8% 0.097 298.3)
-
Step 950
950
#2B1F40
oklch(27.1% 0.061 299.1)
#5B3D8B 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) | #1D4D8E | 0.088 |
| Deuteranopia (no green cones) | #264C89 | 0.081 |
| Tritanopia (no blue cones) | #514D5E | 0.097 |
| Achromatopsia (no color) | #4D4D4D | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3D8B
#5B3D8B
oklch(43.3% 0.126 298.8)
- #4B5800
#4B5800
oklch(43.4% 0.102 119.1)
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 #5B3D8B, 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 0.037
- Blueberry #464196 ΔE 0.040
- Twilight #4E518B ΔE 0.055
- Dusk #4E5481 ΔE 0.069
- Cobalt #1E488F ΔE 0.085
- Dusk Blue #26538D ΔE 0.087
- Denim Blue #3B5B92 ΔE 0.087
Use #5B3D8B 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.