#3F346A
Closest named color: Dark Slate Blue (#483D8B). oklch(36.5% 0.091 290.6), rgb(63, 52, 106).
Aa
White text reads best on this color (10.99:1).
About this color
#3F346A is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 10.99:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.91:1 |
| White text | 10.99:1 |
Values
| HEX | #3F346A |
| RGB | rgb(63, 52, 106) |
| HSL | hsl(252, 34%, 31%) |
| OKLCH | oklch(36.5% 0.091 290.6) |
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 #3F346A | 10.99:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #3F346A | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #3F346A text on white | 10.99:1 | AAA | Lc 95.3 | Preferred for body text |
| #3F346A text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D5F1
oklch(88.4% 0.038 290.5)
-
Step 300
300
#C0BAEA
oklch(81% 0.067 290.5)
-
Step 400
400
#A094E0
oklch(70.6% 0.11 290.5)
-
Step 500
500
#8A78D7
oklch(63.1% 0.14 290.5)
-
Step 600
600
#755FC4
oklch(55.6% 0.152 290.6)
-
Step 700
700
#624EA9
oklch(49% 0.14 290.4)
-
Step 800
800
#504089
oklch(42.6% 0.117 290.7)
-
Step 900
900 (this color)
#3F346A
oklch(36.5% 0.091 290.6)
-
Step 950
950
#272140
oklch(27.1% 0.057 291)
#3F346A 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) | #203D6C | 0.048 |
| Deuteranopia (no green cones) | #213B69 | 0.046 |
| Tritanopia (no blue cones) | #343F4A | 0.075 |
| Achromatopsia (no color) | #3C3C3C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F346A
#3F346A
oklch(36.5% 0.091 290.6)
- #414200
#414200
oklch(36.6% 0.08 110.7)
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 #3F346A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.063
- Twilight Blue #0A437A ΔE 0.069
- Marine Blue #01386A ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.077
- Blueberry #464196 ΔE 0.079
- Space Cadet #2B2D42 ΔE 0.081
Use #3F346A 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.