#5B408B
Closest named color: Dark Slate Blue (#483D8B). oklch(43.8% 0.121 297.9), rgb(91, 64, 139).
Aa
White text reads best on this color (8.23:1).
About this color
#5B408B is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.121 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 0.035 away. White text reads best on it, at 8.23:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #5B408B |
| RGB | rgb(91, 64, 139) |
| HSL | hsl(262, 37%, 40%) |
| OKLCH | oklch(43.8% 0.121 297.9) |
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 #5B408B | 8.23:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #5B408B | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #5B408B text on white | 8.23:1 | AAA | Lc 88.2 | Fine for body text |
| #5B408B text on black | 2.55:1 | Fails | Lc -13.9 | 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
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DCD4F0
oklch(88.5% 0.039 298.7)
-
Step 300
300
#C6B7E9
oklch(80.9% 0.071 298.5)
-
Step 400
400
#A991DE
oklch(70.7% 0.113 297.8)
-
Step 500
500
#9574D4
oklch(63.2% 0.143 298.1)
-
Step 600
600
#805AC2
oklch(55.6% 0.157 298)
-
Step 700
700
#6C49A7
oklch(49% 0.146 298)
-
Step 800
800 (this color)
#5B408B
oklch(43.8% 0.121 297.9)
-
Step 900
900
#48356C
oklch(37.7% 0.093 297.7)
-
Step 950
950
#2A1F40
oklch(27% 0.061 297.6)
#5B408B 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) | #234F8E | 0.081 |
| Deuteranopia (no green cones) | #2B4E89 | 0.075 |
| Tritanopia (no blue cones) | #514F5F | 0.095 |
| Achromatopsia (no color) | #4F4F4F | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B408B
#5B408B
oklch(43.8% 0.121 297.9)
- #4E5900
#4E5900
oklch(43.9% 0.102 117.7)
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 #5B408B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.040
- Rebecca Purple #663399 ΔE 0.042
- Twilight #4E518B ΔE 0.048
- Dusk #4E5481 ΔE 0.062
- Dusty Grape #545775 ΔE 0.081
- Denim Blue #3B5B92 ΔE 0.081
- Dusk Blue #26538D ΔE 0.083
Use #5B408B 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.