#3B3279
Closest named color: Dark Slate Blue (#483D8B). oklch(36.8% 0.117 284.9), rgb(59, 50, 121).
Aa
White text reads best on this color (10.94:1).
About this color
#3B3279 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.117 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.047 away. White text reads best on it, at 10.94:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #3B3279 |
| RGB | rgb(59, 50, 121) |
| HSL | hsl(248, 42%, 34%) |
| OKLCH | oklch(36.8% 0.117 284.9) |
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 #3B3279 | 10.94:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #3B3279 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #3B3279 text on white | 10.94:1 | AAA | Lc 95.1 | Preferred for body text |
| #3B3279 text on black | 1.91:1 | Fails | Lc -7.6 | 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 900.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D5D5F9
oklch(88.4% 0.049 285.3)
-
Step 300
300
#BAB9F7
oklch(80.8% 0.087 285)
-
Step 400
400
#9892F4
oklch(70.6% 0.141 285)
-
Step 500
500
#8174EF
oklch(63.1% 0.178 284.9)
-
Step 600
600
#6C59DE
oklch(55.6% 0.194 284.6)
-
Step 700
700
#5B48C1
oklch(49.2% 0.181 284.7)
-
Step 800
800
#4A3C9C
oklch(42.7% 0.15 284.8)
-
Step 900
900 (this color)
#3B3279
oklch(36.8% 0.117 284.9)
-
Step 950
950
#241F48
oklch(26.9% 0.074 285.9)
#3B3279 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) | #043F7B | 0.061 |
| Deuteranopia (no green cones) | #003A77 | 0.061 |
| Tritanopia (no blue cones) | #254250 | 0.098 |
| Achromatopsia (no color) | #3C3C3C | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3279
#3B3279
oklch(36.8% 0.117 284.9)
- #464100
#464100
oklch(36.9% 0.078 104.7)
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 #3B3279, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.063
- Twilight Blue #0A437A ΔE 0.064
- Marine Blue #01386A ΔE 0.069
- Cobalt #1E488F ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.076
- Indigo #4B0082 ΔE 0.081
- Marine #042E60 ΔE 0.083
Use #3B3279 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.