#3F3483
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.128 285), rgb(63, 52, 131).
Aa
White text reads best on this color (10.34:1).
About this color
#3F3483 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.128 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 10.34:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.34:1 |
Values
| HEX | #3F3483 |
| RGB | rgb(63, 52, 131) |
| HSL | hsl(248, 43%, 36%) |
| OKLCH | oklch(38.3% 0.128 285) |
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 #3F3483 | 10.34:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #3F3483 | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #3F3483 text on white | 10.34:1 | AAA | Lc 93.7 | Preferred for body text |
| #3F3483 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D5D5FC
oklch(88.5% 0.053 285.3)
-
Step 300
300
#BAB8FC
oklch(80.9% 0.095 285.4)
-
Step 400
400
#9890FB
oklch(70.6% 0.153 285.2)
-
Step 500
500
#8170F8
oklch(63% 0.196 285)
-
Step 600
600
#6D54E7
oklch(55.6% 0.212 285)
-
Step 700
700
#5C43C9
oklch(49.1% 0.197 285.1)
-
Step 800
800
#4B38A3
oklch(42.7% 0.164 285.2)
-
Step 900
900 (this color)
#3F3483
oklch(38.3% 0.128 285)
-
Step 950
950
#241E4C
oklch(27% 0.082 285.5)
#3F3483 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) | #004286 | 0.066 |
| Deuteranopia (no green cones) | #003E81 | 0.065 |
| Tritanopia (no blue cones) | #264656 | 0.107 |
| Achromatopsia (no color) | #404040 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3483
#3F3483
oklch(38.3% 0.128 285)
- #4A4500
#4A4500
oklch(38.3% 0.081 104.9)
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 #3F3483, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.046
- Cobalt #1E488F ΔE 0.063
- Twilight Blue #0A437A ΔE 0.068
- Sapphire #2138AB ΔE 0.077
- Rebecca Purple #663399 ΔE 0.080
- Indigo #4B0082 ΔE 0.081
- Marine Blue #01386A ΔE 0.082
Use #3F3483 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.