#3D397F
Closest named color: Dark Slate Blue (#483D8B). oklch(38.8% 0.115 282.2), rgb(61, 57, 127).
Aa
White text reads best on this color (10.04:1).
About this color
#3D397F is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.115 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 10.04:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #3D397F |
| RGB | rgb(61, 57, 127) |
| HSL | hsl(243, 38%, 36%) |
| OKLCH | oklch(38.8% 0.115 282.2) |
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 #3D397F | 10.04:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #3D397F | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #3D397F text on white | 10.04:1 | AAA | Lc 93.1 | Preferred for body text |
| #3D397F text on black | 2.09:1 | Fails | Lc -9.4 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D4D6F9
oklch(88.6% 0.048 282.8)
-
Step 300
300
#B7BAF7
oklch(80.8% 0.086 282.1)
-
Step 400
400
#9494F3
oklch(70.6% 0.137 282.3)
-
Step 500
500
#7C76EF
oklch(63% 0.176 282.3)
-
Step 600
600
#675CDD
oklch(55.6% 0.19 282.1)
-
Step 700
700
#564AC0
oklch(49% 0.178 282.2)
-
Step 800
800
#463E9B
oklch(42.7% 0.146 282.1)
-
Step 900
900 (this color)
#3D397F
oklch(38.8% 0.115 282.2)
-
Step 950
950
#222048
oklch(26.9% 0.072 282.7)
#3D397F 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) | #134481 | 0.052 |
| Deuteranopia (no green cones) | #0D407D | 0.053 |
| Tritanopia (no blue cones) | #244956 | 0.099 |
| Achromatopsia (no color) | #424242 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D397F
#3D397F
oklch(38.8% 0.115 282.2)
- #4D4600
#4D4600
oklch(38.9% 0.082 103)
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 #3D397F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.045
- Cobalt #1E488F ΔE 0.054
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.071
- Dusk Blue #26538D ΔE 0.074
- Twilight #4E518B ΔE 0.075
- Marine Blue #01386A ΔE 0.075
Use #3D397F 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.