#5B3A81
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.117 303.2), rgb(91, 58, 129).
Aa
White text reads best on this color (8.87:1).
About this color
#5B3A81 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.117 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 8.87:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #5B3A81 |
| RGB | rgb(91, 58, 129) |
| HSL | hsl(268, 38%, 37%) |
| OKLCH | oklch(42.1% 0.117 303.2) |
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 #5B3A81 | 8.87:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #5B3A81 | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #5B3A81 text on white | 8.87:1 | AAA | Lc 90.1 | Preferred for body text |
| #5B3A81 text on black | 2.36:1 | Fails | Lc -12.2 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DED4EE
oklch(88.6% 0.037 303.1)
-
Step 300
300
#C9B6E6
oklch(80.8% 0.07 302.9)
-
Step 400
400
#AF8FD9
oklch(70.7% 0.111 303.6)
-
Step 500
500
#9B72CE
oklch(63.1% 0.14 303.2)
-
Step 600
600
#8658BB
oklch(55.5% 0.153 303.2)
-
Step 700
700
#7248A1
oklch(49.1% 0.141 303.4)
-
Step 800
800 (this color)
#5B3A81
oklch(42.1% 0.117 303.2)
-
Step 900
900
#4C3469
oklch(37.8% 0.091 303.2)
-
Step 950
950
#2C1F3D
oklch(27% 0.056 302.8)
#5B3A81 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) | #214983 | 0.088 |
| Deuteranopia (no green cones) | #2C4A7F | 0.080 |
| Tritanopia (no blue cones) | #544758 | 0.086 |
| Achromatopsia (no color) | #4A4A4A | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3A81
#5B3A81
oklch(42.1% 0.117 303.2)
- #435600
#435600
oklch(42.2% 0.104 123.1)
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 #5B3A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Rebecca Purple #663399 ΔE 0.047
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.062
- Dusk #4E5481 ΔE 0.072
- Dusty Grape #545775 ΔE 0.087
- Cobalt #1E488F ΔE 0.090
- Dusk Blue #26538D ΔE 0.093
Use #5B3A81 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.