#5B3887
Closest named color: Dark Slate Blue (#483D8B). oklch(42.2% 0.128 301.6), rgb(91, 56, 135).
Aa
White text reads best on this color (8.89:1).
About this color
#5B3887 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.128 and its hue 302°. 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 8.89:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #5B3887 |
| RGB | rgb(91, 56, 135) |
| HSL | hsl(267, 41%, 37%) |
| OKLCH | oklch(42.2% 0.128 301.6) |
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 #5B3887 | 8.89:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #5B3887 | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #5B3887 text on white | 8.89:1 | AAA | Lc 90.1 | Preferred for body text |
| #5B3887 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DED3F1
oklch(88.5% 0.042 302.2)
-
Step 300
300
#C9B6EA
oklch(81% 0.075 301.4)
-
Step 400
400
#AE8EDF
oklch(70.7% 0.12 301.6)
-
Step 500
500
#9B70D6
oklch(63.2% 0.153 301.6)
-
Step 600
600
#8655C3
oklch(55.5% 0.167 301.8)
-
Step 700
700
#7245A9
oklch(49.2% 0.156 301.7)
-
Step 800
800 (this color)
#5B3887
oklch(42.2% 0.128 301.6)
-
Step 900
900
#4C326D
oklch(37.7% 0.1 302.2)
-
Step 950
950
#2C1E40
oklch(27% 0.063 301.3)
#5B3887 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) | #16498A | 0.096 |
| Deuteranopia (no green cones) | #244985 | 0.088 |
| Tritanopia (no blue cones) | #52485A | 0.097 |
| Achromatopsia (no color) | #4A4A4A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3887
#5B3887
oklch(42.2% 0.128 301.6)
- #455500
#455500
oklch(42.1% 0.101 121.4)
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 #5B3887, 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
- Rebecca Purple #663399 ΔE 0.037
- Blueberry #464196 ΔE 0.046
- Twilight #4E518B ΔE 0.066
- Dusk #4E5481 ΔE 0.078
- Cobalt #1E488F ΔE 0.090
- Chrysanthemum #560BAD ΔE 0.091
- Dusk Blue #26538D ΔE 0.096
Use #5B3887 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.