#3B397F
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.115 280.8), rgb(59, 57, 127).
Aa
White text reads best on this color (10.10:1).
About this color
#3B397F is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.115 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 10.10:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #3B397F |
| RGB | rgb(59, 57, 127) |
| HSL | hsl(242, 38%, 36%) |
| OKLCH | oklch(38.6% 0.115 280.8) |
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 #3B397F | 10.10:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #3B397F | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #3B397F text on white | 10.10:1 | AAA | Lc 93.2 | Preferred for body text |
| #3B397F text on black | 2.07:1 | Fails | Lc -9.3 | 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
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D3D6F9
oklch(88.5% 0.048 281.5)
-
Step 300
300
#B6BBF8
oklch(81% 0.086 280.6)
-
Step 400
400
#9295F4
oklch(70.7% 0.138 280.9)
-
Step 500
500
#7977F0
oklch(63% 0.177 280.8)
-
Step 600
600
#645CDE
oklch(55.5% 0.192 280.9)
-
Step 700
700
#544BC1
oklch(49.1% 0.178 281)
-
Step 800
800
#443E9C
oklch(42.6% 0.148 280.9)
-
Step 900
900 (this color)
#3B397F
oklch(38.6% 0.115 280.8)
-
Step 950
950
#212049
oklch(26.9% 0.074 281.3)
#3B397F 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) | #124481 | 0.050 |
| Deuteranopia (no green cones) | #0A3F7E | 0.051 |
| Tritanopia (no blue cones) | #1F4956 | 0.100 |
| Achromatopsia (no color) | #424242 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B397F
#3B397F
oklch(38.6% 0.115 280.8)
- #4E4500
#4E4500
oklch(38.8% 0.081 100.9)
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 #3B397F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.047
- Cobalt #1E488F ΔE 0.053
- Twilight Blue #0A437A ΔE 0.055
- Light Navy #155084 ΔE 0.070
- Marine Blue #01386A ΔE 0.072
- Dusk Blue #26538D ΔE 0.073
- Twilight #4E518B ΔE 0.076
Use #3B397F 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.