#5B3177
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.12 309.7), rgb(91, 49, 119).
Aa
White text reads best on this color (9.76:1).
About this color
#5B3177 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.120 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 9.76:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.76:1 |
Values
| HEX | #5B3177 |
| RGB | rgb(91, 49, 119) |
| HSL | hsl(276, 42%, 33%) |
| OKLCH | oklch(40% 0.12 309.7) |
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 #5B3177 | 9.76:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #5B3177 | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #5B3177 text on white | 9.76:1 | AAA | Lc 92.3 | Preferred for body text |
| #5B3177 text on black | 2.15:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F8F3FC
oklch(97.1% 0.013 310.5)
-
Step 100
100
#EFE5F7
oklch(93.5% 0.026 310.4)
-
Step 200
200
#E3D1F2
oklch(88.5% 0.049 309.7)
-
Step 300
300
#D2B1ED
oklch(80.9% 0.09 309.4)
-
Step 400
400
#BC85E3
oklch(70.7% 0.144 310.1)
-
Step 500
500
#AB63DB
oklch(63.1% 0.184 309.8)
-
Step 600
600
#9646C8
oklch(55.6% 0.199 309.7)
-
Step 700
700
#8036AD
oklch(49.1% 0.185 309.7)
-
Step 800
800
#682E8C
oklch(42.7% 0.153 309.8)
-
Step 900
900 (this color)
#5B3177
oklch(40% 0.12 309.7)
-
Step 950
950
#321A42
oklch(27.1% 0.076 310)
#5B3177 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) | #1A4279 | 0.101 |
| Deuteranopia (no green cones) | #2A4575 | 0.090 |
| Tritanopia (no blue cones) | #573E4F | 0.084 |
| Achromatopsia (no color) | #444444 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3177
#5B3177
oklch(40% 0.12 309.7)
- #345200
#345200
oklch(40% 0.107 129.7)
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 #5B3177, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Rebecca Purple #663399 ΔE 0.059
- Blueberry #464196 ΔE 0.070
- Grape Purple #5D1451 ΔE 0.081
- Twilight #4E518B ΔE 0.085
- Indigo #4B0082 ΔE 0.088
- Rich Purple #720058 ΔE 0.090
- Royal Purple #4B006E ΔE 0.091
Use #5B3177 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.