#5B3078
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.123 309.5), rgb(91, 48, 120).
Aa
White text reads best on this color (9.81:1).
About this color
#5B3078 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.123 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.053 away. White text reads best on it, at 9.81:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.81:1 |
Values
| HEX | #5B3078 |
| RGB | rgb(91, 48, 120) |
| HSL | hsl(276, 43%, 33%) |
| OKLCH | oklch(39.9% 0.123 309.5) |
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 #5B3078 | 9.81:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #5B3078 | 2.13:1 | Fails | Lc 11.5 | Not readable |
| #5B3078 text on white | 9.81:1 | AAA | Lc 92.4 | Preferred for body text |
| #5B3078 text on black | 2.13:1 | Fails | Lc -10.0 | 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
#EFE5F8
oklch(93.5% 0.027 309.2)
-
Step 200
200
#E3D0F3
oklch(88.4% 0.052 309.6)
-
Step 300
300
#D2B1EE
oklch(81% 0.091 309)
-
Step 400
400
#BC85E5
oklch(70.8% 0.147 309.5)
-
Step 500
500
#AB62DD
oklch(63.1% 0.187 309.4)
-
Step 600
600
#9744CB
oklch(55.7% 0.205 309.5)
-
Step 700
700
#8134AF
oklch(49.1% 0.19 309.8)
-
Step 800
800
#682D8E
oklch(42.7% 0.157 309.2)
-
Step 900
900 (this color)
#5B3078
oklch(39.9% 0.123 309.5)
-
Step 950
950
#321942
oklch(26.9% 0.078 310.3)
#5B3078 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) | #17427A | 0.105 |
| Deuteranopia (no green cones) | #284476 | 0.093 |
| Tritanopia (no blue cones) | #573D4F | 0.085 |
| Achromatopsia (no color) | #434343 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3078
#5B3078
oklch(39.9% 0.123 309.5)
- #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 #5B3078, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.053
- Rebecca Purple #663399 ΔE 0.058
- Blueberry #464196 ΔE 0.070
- Grape Purple #5D1451 ΔE 0.081
- Indigo #4B0082 ΔE 0.085
- Twilight #4E518B ΔE 0.087
- Royal Purple #4B006E ΔE 0.089
- Purple #800080 ΔE 0.090
Use #5B3078 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.