#3F3A7E
Closest named color: Dark Slate Blue (#483D8B). oklch(39.1% 0.111 283.3), rgb(63, 58, 126).
Aa
White text reads best on this color (9.91:1).
About this color
#3F3A7E is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.111 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 9.91:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.11:1 |
| White text | 9.91:1 |
Values
| HEX | #3F3A7E |
| RGB | rgb(63, 58, 126) |
| HSL | hsl(244, 37%, 36%) |
| OKLCH | oklch(39.1% 0.111 283.3) |
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 #3F3A7E | 9.91:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #3F3A7E | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #3F3A7E text on white | 9.91:1 | AAA | Lc 92.8 | Preferred for body text |
| #3F3A7E text on black | 2.11:1 | Fails | Lc -9.7 | 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
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D4D6F8
oklch(88.5% 0.047 282.7)
-
Step 300
300
#B9BAF5
oklch(80.9% 0.083 283.6)
-
Step 400
400
#9694F1
oklch(70.7% 0.134 283.4)
-
Step 500
500
#7E77EC
oklch(63.2% 0.171 283.1)
-
Step 600
600
#695CDA
oklch(55.6% 0.186 283.2)
-
Step 700
700
#584BBD
oklch(49.1% 0.172 283.2)
-
Step 800
800
#483E99
oklch(42.7% 0.143 283.5)
-
Step 900
900 (this color)
#3F3A7E
oklch(39.1% 0.111 283.3)
-
Step 950
950
#232047
oklch(27% 0.07 284.1)
#3F3A7E 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) | #184580 | 0.051 |
| Deuteranopia (no green cones) | #14417D | 0.052 |
| Tritanopia (no blue cones) | #294956 | 0.095 |
| Achromatopsia (no color) | #434343 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3A7E
#3F3A7E
oklch(39.1% 0.111 283.3)
- #4D4700
#4D4700
oklch(39.1% 0.083 104.1)
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 #3F3A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.055
- Twilight Blue #0A437A ΔE 0.059
- Light Navy #155084 ΔE 0.070
- Twilight #4E518B ΔE 0.071
- Dusk Blue #26538D ΔE 0.072
- Marine Blue #01386A ΔE 0.077
Use #3F3A7E 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.