#5B3B79
Closest named color: Dark Slate Blue (#483D8B). oklch(41.8% 0.105 306.2), rgb(91, 59, 121).
Aa
White text reads best on this color (8.94:1).
About this color
#5B3B79 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.105 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.045 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #5B3B79 |
| RGB | rgb(91, 59, 121) |
| HSL | hsl(271, 34%, 35%) |
| OKLCH | oklch(41.8% 0.105 306.2) |
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 #5B3B79 | 8.94:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #5B3B79 | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #5B3B79 text on white | 8.94:1 | AAA | Lc 90.3 | Preferred for body text |
| #5B3B79 text on black | 2.34:1 | Fails | Lc -12.0 | 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 800.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EB
oklch(88.6% 0.033 307.1)
-
Step 300
300
#CAB7E0
oklch(80.9% 0.06 306.1)
-
Step 400
400
#B091D1
oklch(70.8% 0.097 306.2)
-
Step 500
500
#9D74C5
oklch(63.2% 0.125 306.4)
-
Step 600
600
#875BB1
oklch(55.5% 0.136 306.1)
-
Step 700
700
#734A99
oklch(49.1% 0.128 306.2)
-
Step 800
800 (this color)
#5B3B79
oklch(41.8% 0.105 306.2)
-
Step 900
900
#4D3564
oklch(37.8% 0.082 306.4)
-
Step 950
950
#2D1F3A
oklch(27% 0.052 307.1)
#5B3B79 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) | #2A487B | 0.079 |
| Deuteranopia (no green cones) | #324A77 | 0.073 |
| Tritanopia (no blue cones) | #564654 | 0.078 |
| Achromatopsia (no color) | #494949 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3B79
#5B3B79
oklch(41.8% 0.105 306.2)
- #3E5603
#3E5603
oklch(41.8% 0.105 126.2)
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 #5B3B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.045
- Blueberry #464196 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.060
- Twilight #4E518B ΔE 0.063
- Dusk #4E5481 ΔE 0.069
- Dusty Grape #545775 ΔE 0.081
- Cobalt #1E488F ΔE 0.093
- Dusk Blue #26538D ΔE 0.093
Use #5B3B79 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.