#3D398B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.132 280.7), rgb(61, 57, 139).
Aa
White text reads best on this color (9.73:1).
About this color
#3D398B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.132 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.022 away. White text reads best on it, at 9.73:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #3D398B |
| RGB | rgb(61, 57, 139) |
| HSL | hsl(243, 42%, 38%) |
| OKLCH | oklch(39.7% 0.132 280.7) |
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 #3D398B | 9.73:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #3D398B | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #3D398B text on white | 9.73:1 | AAA | Lc 92.3 | Preferred for body text |
| #3D398B text on black | 2.15:1 | Fails | Lc -10.2 | 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
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FE
oklch(88.6% 0.055 280.7)
-
Step 300
300
#B5BAFF
oklch(81% 0.097 280.8)
-
Step 400
400
#9092FF
oklch(70.6% 0.157 280.8)
-
Step 500
500
#7872FF
oklch(63.1% 0.203 280.8)
-
Step 600
600
#6455EE
oklch(55.6% 0.22 280.9)
-
Step 700
700
#5344CF
oklch(49.1% 0.205 280.6)
-
Step 800
800
#4439A7
oklch(42.7% 0.169 281)
-
Step 900
900 (this color)
#3D398B
oklch(39.7% 0.132 280.7)
-
Step 950
950
#201F4E
oklch(27% 0.084 280.1)
#3D398B 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) | #00478E | 0.059 |
| Deuteranopia (no green cones) | #004189 | 0.057 |
| Tritanopia (no blue cones) | #184C5C | 0.113 |
| Achromatopsia (no color) | #444444 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D398B
#3D398B
oklch(39.7% 0.132 280.7)
- #514800
#514800
oklch(39.8% 0.083 101.2)
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 #3D398B, 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 0.031
- Cobalt #1E488F ΔE 0.049
- Sapphire #2138AB ΔE 0.064
- Twilight Blue #0A437A ΔE 0.065
- Dusk Blue #26538D ΔE 0.072
- Light Navy #155084 ΔE 0.073
- Twilight #4E518B ΔE 0.073
Use #3D398B 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.