#5B3671
Closest named color: Dark Slate Blue (#483D8B). oklch(40.4% 0.103 311.5), rgb(91, 54, 113).
Aa
White text reads best on this color (9.49:1).
About this color
#5B3671 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.103 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 9.49:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #5B3671 |
| RGB | rgb(91, 54, 113) |
| HSL | hsl(278, 35%, 33%) |
| OKLCH | oklch(40.4% 0.103 311.5) |
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 #5B3671 | 9.49:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #5B3671 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #5B3671 text on white | 9.49:1 | AAA | Lc 91.7 | Preferred for body text |
| #5B3671 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EEE7F3
oklch(93.7% 0.018 311.6)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CEB6DE
oklch(80.9% 0.061 311.8)
-
Step 400
400
#B48FCD
oklch(70.6% 0.097 311.2)
-
Step 500
500
#A272C0
oklch(63.1% 0.124 311.5)
-
Step 600
600
#8D59AC
oklch(55.6% 0.135 311.6)
-
Step 700
700
#784994
oklch(49.2% 0.125 311.5)
-
Step 800
800 (this color)
#5B3671
oklch(40.4% 0.103 311.5)
-
Step 900
900
#503461
oklch(37.8% 0.081 311.7)
-
Step 950
950
#2F1F39
oklch(27.1% 0.051 311.6)
#5B3671 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) | #284473 | 0.085 |
| Deuteranopia (no green cones) | #33466F | 0.076 |
| Tritanopia (no blue cones) | #59404E | 0.073 |
| Achromatopsia (no color) | #464646 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3671
#5B3671
oklch(40.4% 0.103 311.5)
- #33540C
#33540C
oklch(40.5% 0.104 131.9)
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 #5B3671, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Rebecca Purple #663399 ΔE 0.070
- Blueberry #464196 ΔE 0.073
- Twilight #4E518B ΔE 0.078
- Dusk #4E5481 ΔE 0.082
- Grape Purple #5D1451 ΔE 0.082
- Dusty Grape #545775 ΔE 0.091
- Purple Brown #673A3F ΔE 0.092
Use #5B3671 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.