#3B3A73
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.095 281.7), rgb(59, 58, 115).
Aa
White text reads best on this color (10.30:1).
About this color
#3B3A73 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.095 and its hue 282°. 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 10.30:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #3B3A73 |
| RGB | rgb(59, 58, 115) |
| HSL | hsl(241, 33%, 34%) |
| OKLCH | oklch(38% 0.095 281.7) |
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 #3B3A73 | 10.30:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #3B3A73 | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #3B3A73 text on white | 10.30:1 | AAA | Lc 93.8 | Preferred for body text |
| #3B3A73 text on black | 2.03:1 | Fails | Lc -8.8 | 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
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D4D7F3
oklch(88.6% 0.039 280.7)
-
Step 300
300
#B8BCEE
oklch(80.9% 0.071 281.1)
-
Step 400
400
#9597E6
oklch(70.6% 0.115 281.9)
-
Step 500
500
#7C7CDF
oklch(63.1% 0.146 281.4)
-
Step 600
600
#6763CC
oklch(55.7% 0.158 281.7)
-
Step 700
700
#5651B1
oklch(49.1% 0.148 281.8)
-
Step 800
800
#46438F
oklch(42.7% 0.122 281.7)
-
Step 900
900 (this color)
#3B3A73
oklch(38% 0.095 281.7)
-
Step 950
950
#222243
oklch(27% 0.06 281.6)
#3B3A73 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) | #224275 | 0.037 |
| Deuteranopia (no green cones) | #1F3E72 | 0.037 |
| Tritanopia (no blue cones) | #284651 | 0.082 |
| Achromatopsia (no color) | #404040 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3A73
#3B3A73
oklch(38% 0.095 281.7)
- #4B4300
#4B4300
oklch(37.9% 0.079 101.7)
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 #3B3A73, 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 0.052
- Cobalt #1E488F ΔE 0.062
- Blueberry #464196 ΔE 0.063
- Marine Blue #01386A ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.068
- Light Navy #155084 ΔE 0.070
Use #3B3A73 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.