#3B3874
Closest named color: Dark Slate Blue (#483D8B). oklch(37.6% 0.1 282.7), rgb(59, 56, 116).
Aa
White text reads best on this color (10.47:1).
About this color
#3B3874 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.100 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 10.47:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #3B3874 |
| RGB | rgb(59, 56, 116) |
| HSL | hsl(243, 35%, 34%) |
| OKLCH | oklch(37.6% 0.1 282.7) |
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 #3B3874 | 10.47:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #3B3874 | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #3B3874 text on white | 10.47:1 | AAA | Lc 94.1 | Preferred for body text |
| #3B3874 text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F8
oklch(93.5% 0.022 283.1)
-
Step 200
200
#D4D6F5
oklch(88.4% 0.043 282.6)
-
Step 300
300
#B9BBF0
oklch(80.9% 0.075 282.9)
-
Step 400
400
#9696E9
oklch(70.7% 0.12 282.9)
-
Step 500
500
#7E7AE2
oklch(63.1% 0.153 282.8)
-
Step 600
600
#6861D0
oklch(55.6% 0.166 282.4)
-
Step 700
700
#574FB4
oklch(49% 0.155 282.6)
-
Step 800
800
#474192
oklch(42.6% 0.129 282.8)
-
Step 900
900 (this color)
#3B3874
oklch(37.6% 0.1 282.7)
-
Step 950
950
#222144
oklch(26.9% 0.064 282.5)
#3B3874 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) | #1D4176 | 0.043 |
| Deuteranopia (no green cones) | #1A3D73 | 0.043 |
| Tritanopia (no blue cones) | #274550 | 0.087 |
| Achromatopsia (no color) | #3F3F3F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3874
#3B3874
oklch(37.6% 0.1 282.7)
- #494300
#494300
oklch(37.7% 0.08 103.8)
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 #3B3874, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Twilight Blue #0A437A ΔE 0.055
- Blueberry #464196 ΔE 0.063
- Cobalt #1E488F ΔE 0.064
- Marine Blue #01386A ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.071
- Light Navy #155084 ΔE 0.074
Use #3B3874 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.