#5B3B7F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.2% 0.113 303.7), rgb(91, 59, 127).
Aa
White text reads best on this color (8.83:1).
About this color
#5B3B7F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.113 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 8.83:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #5B3B7F |
| RGB | rgb(91, 59, 127) |
| HSL | hsl(268, 37%, 36%) |
| OKLCH | oklch(42.2% 0.113 303.7) |
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 #5B3B7F | 8.83:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #5B3B7F | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #5B3B7F text on white | 8.83:1 | AAA | Lc 90.0 | Fine for body text |
| #5B3B7F text on black | 2.37:1 | Fails | Lc -12.3 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DED4ED
oklch(88.6% 0.036 303.8)
-
Step 300
300
#C9B7E4
oklch(80.9% 0.065 303.2)
-
Step 400
400
#AE90D6
oklch(70.6% 0.105 303.5)
-
Step 500
500
#9B73CB
oklch(63.1% 0.134 303.8)
-
Step 600
600
#865AB8
oklch(55.6% 0.146 303.6)
-
Step 700
700
#72499F
oklch(49.2% 0.137 303.8)
-
Step 800
800 (this color)
#5B3B7F
oklch(42.2% 0.113 303.7)
-
Step 900
900
#4C3467
oklch(37.7% 0.088 304.2)
-
Step 950
950
#2C1F3C
oklch(27% 0.055 303.6)
#5B3B7F 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) | #254981 | 0.084 |
| Deuteranopia (no green cones) | #2E4A7D | 0.077 |
| Tritanopia (no blue cones) | #554757 | 0.083 |
| Achromatopsia (no color) | #4A4A4A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3B7F
#5B3B7F
oklch(42.2% 0.113 303.7)
- #425600
#425600
oklch(42.1% 0.104 123.7)
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 #5B3B7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Rebecca Purple #663399 ΔE 0.051
- Blueberry #464196 ΔE 0.052
- Twilight #4E518B ΔE 0.060
- Dusk #4E5481 ΔE 0.069
- Dusty Grape #545775 ΔE 0.084
- Cobalt #1E488F ΔE 0.090
- Dusk Blue #26538D ΔE 0.092
Use #5B3B7F 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.