#3D398D
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.135 280.5), rgb(61, 57, 141).
Aa
White text reads best on this color (9.68:1).
About this color
#3D398D is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.135 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.022 away. White text reads best on it, at 9.68:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #3D398D |
| RGB | rgb(61, 57, 141) |
| HSL | hsl(243, 42%, 39%) |
| OKLCH | oklch(39.9% 0.135 280.5) |
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 #3D398D | 9.68:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #3D398D | 2.16:1 | Fails | Lc 11.8 | Not readable |
| #3D398D text on white | 9.68:1 | AAA | Lc 92.1 | Preferred for body text |
| #3D398D text on black | 2.16:1 | Fails | Lc -10.3 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FE
oklch(93.6% 0.03 281.7)
-
Step 200
200
#D1D6FE
oklch(88.5% 0.055 279.6)
-
Step 300
300
#B4BAFF
oklch(80.9% 0.098 280.1)
-
Step 400
400
#9093FF
oklch(70.8% 0.156 280.4)
-
Step 500
500
#7772FF
oklch(63% 0.203 280.4)
-
Step 600
600
#6354F1
oklch(55.6% 0.225 280.4)
-
Step 700
700
#5343D2
oklch(49.2% 0.209 280.5)
-
Step 800
800
#4338A9
oklch(42.6% 0.173 280.5)
-
Step 900
900 (this color)
#3D398D
oklch(39.9% 0.135 280.5)
-
Step 950
950
#201F4E
oklch(27% 0.084 280.1)
#3D398D 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) | #004890 | 0.060 |
| Deuteranopia (no green cones) | #00418B | 0.057 |
| Tritanopia (no blue cones) | #164D5D | 0.116 |
| Achromatopsia (no color) | #444444 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D398D
#3D398D
oklch(39.9% 0.135 280.5)
- #524800
#524800
oklch(39.9% 0.083 100.2)
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 #3D398D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.022
- Blueberry #464196 ΔE 0.030
- Cobalt #1E488F ΔE 0.049
- Sapphire #2138AB ΔE 0.061
- Twilight Blue #0A437A ΔE 0.066
- Dusk Blue #26538D ΔE 0.072
- Twilight #4E518B ΔE 0.074
- Light Navy #155084 ΔE 0.074
Use #3D398D 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.