#3B3479
Closest named color: Dark Slate Blue (#483D8B). oklch(37.2% 0.114 284), rgb(59, 52, 121).
Aa
White text reads best on this color (10.75:1).
About this color
#3B3479 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.114 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.75:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #3B3479 |
| RGB | rgb(59, 52, 121) |
| HSL | hsl(246, 40%, 34%) |
| OKLCH | oklch(37.2% 0.114 284) |
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 #3B3479 | 10.75:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #3B3479 | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #3B3479 text on white | 10.75:1 | AAA | Lc 94.7 | Preferred for body text |
| #3B3479 text on black | 1.95:1 | Fails | Lc -7.9 | 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
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D5D6F8
oklch(88.6% 0.047 284.1)
-
Step 300
300
#B9BAF6
oklch(80.9% 0.084 283.6)
-
Step 400
400
#9793F2
oklch(70.6% 0.137 284.2)
-
Step 500
500
#8076ED
oklch(63.2% 0.173 284.1)
-
Step 600
600
#6B5BDC
oklch(55.7% 0.189 284)
-
Step 700
700
#594ABF
oklch(49.2% 0.176 283.7)
-
Step 800
800
#493D9A
oklch(42.7% 0.146 284.2)
-
Step 900
900 (this color)
#3B3479
oklch(37.2% 0.114 284)
-
Step 950
950
#232048
oklch(27% 0.072 283.9)
#3B3479 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) | #0C407B | 0.056 |
| Deuteranopia (no green cones) | #073B78 | 0.057 |
| Tritanopia (no blue cones) | #254351 | 0.095 |
| Achromatopsia (no color) | #3E3E3E | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3479
#3B3479
oklch(37.2% 0.114 284)
- #474200
#474200
oklch(37.2% 0.079 104.7)
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 #3B3479, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.061
- Cobalt #1E488F ΔE 0.066
- Marine Blue #01386A ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.075
- Light Navy #155084 ΔE 0.082
- Marine #042E60 ΔE 0.084
Use #3B3479 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.