#3B3491
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.148 280.5), rgb(59, 52, 145).
Aa
White text reads best on this color (10.06:1).
About this color
#3B3491 is a dark, vivid purple. In OKLCH its lightness is 39%, its chroma 0.148 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 10.06:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.06:1 |
Values
| HEX | #3B3491 |
| RGB | rgb(59, 52, 145) |
| HSL | hsl(245, 47%, 39%) |
| OKLCH | oklch(39.2% 0.148 280.5) |
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 #3B3491 | 10.06:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #3B3491 | 2.08:1 | Fails | Lc 11.0 | Not readable |
| #3B3491 text on white | 10.06:1 | AAA | Lc 92.9 | Preferred for body text |
| #3B3491 text on black | 2.08:1 | Fails | Lc -9.5 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D1D6FF
oklch(88.5% 0.057 279.7)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#9093FF
oklch(70.8% 0.156 280.4)
-
Step 500
500
#7772FF
oklch(63% 0.203 280.4)
-
Step 600
600
#634DFC
oklch(55.5% 0.246 280.4)
-
Step 700
700
#533CDC
oklch(49.1% 0.229 280.4)
-
Step 800
800
#4333B2
oklch(42.7% 0.19 280.3)
-
Step 900
900 (this color)
#3B3491
oklch(39.2% 0.148 280.5)
-
Step 950
950
#201D52
oklch(27% 0.094 280.6)
#3B3491 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) | #004594 | 0.061 |
| Deuteranopia (no green cones) | #003E8F | 0.056 |
| Tritanopia (no blue cones) | #054B5D | 0.127 |
| Achromatopsia (no color) | #424242 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3491
#3B3491
oklch(39.2% 0.148 280.5)
- #4F4600
#4F4600
oklch(39.1% 0.082 101)
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 #3B3491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.039
- Sapphire #2138AB ΔE 0.054
- Cobalt #1E488F ΔE 0.057
- Indigo Blue #3A18B1 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.067
- Twilight Blue #0A437A ΔE 0.073
- Rebecca Purple #663399 ΔE 0.079
Use #3B3491 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.