#5B3889
Closest named color: Rebecca Purple (#663399). oklch(42.3% 0.131 300.9), rgb(91, 56, 137).
Aa
White text reads best on this color (8.85:1).
About this color
#5B3889 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.131 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.034 away. White text reads best on it, at 8.85:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #5B3889 |
| RGB | rgb(91, 56, 137) |
| HSL | hsl(266, 42%, 38%) |
| OKLCH | oklch(42.3% 0.131 300.9) |
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 #5B3889 | 8.85:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #5B3889 | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #5B3889 text on white | 8.85:1 | AAA | Lc 89.9 | Fine for body text |
| #5B3889 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F1
oklch(88.4% 0.042 300.7)
-
Step 300
300
#C9B6EB
oklch(81% 0.076 301.1)
-
Step 400
400
#AE8EE1
oklch(70.8% 0.123 301.1)
-
Step 500
500
#9A6FD8
oklch(63% 0.157 300.9)
-
Step 600
600
#8555C5
oklch(55.5% 0.169 300.8)
-
Step 700
700
#7144AB
oklch(49% 0.159 300.8)
-
Step 800
800 (this color)
#5B3889
oklch(42.3% 0.131 300.9)
-
Step 900
900
#4B326E
oklch(37.6% 0.101 300.9)
-
Step 950
950
#2C1E41
oklch(27.1% 0.065 300.6)
#5B3889 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) | #134A8C | 0.098 |
| Deuteranopia (no green cones) | #214A87 | 0.090 |
| Tritanopia (no blue cones) | #52485B | 0.098 |
| Achromatopsia (no color) | #4A4A4A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3889
#5B3889
oklch(42.3% 0.131 300.9)
- #465600
#465600
oklch(42.4% 0.102 121.2)
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 #5B3889, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.045
- Twilight #4E518B ΔE 0.066
- Dusk #4E5481 ΔE 0.079
- Chrysanthemum #560BAD ΔE 0.089
- Cobalt #1E488F ΔE 0.090
- Dusk Blue #26538D ΔE 0.095
Use #5B3889 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.