#3F305F
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.081 296.7), rgb(63, 48, 95).
Aa
White text reads best on this color (11.67:1).
About this color
#3F305F is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.081 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 11.67:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #3F305F |
| RGB | rgb(63, 48, 95) |
| HSL | hsl(259, 33%, 28%) |
| OKLCH | oklch(34.9% 0.081 296.7) |
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 #3F305F | 11.67:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #3F305F | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #3F305F text on white | 11.67:1 | AAA | Lc 96.7 | Preferred for body text |
| #3F305F text on black | 1.79:1 | Fails | Lc 0.0 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F5
oklch(93.7% 0.018 296.6)
-
Step 200
200
#DBD5ED
oklch(88.5% 0.033 297.2)
-
Step 300
300
#C4B9E4
oklch(80.9% 0.061 296.7)
-
Step 400
400
#A694D6
oklch(70.7% 0.097 296.4)
-
Step 500
500
#9178CB
oklch(63% 0.124 296.6)
-
Step 600
600
#7C60B8
oklch(55.7% 0.134 296.5)
-
Step 700
700
#694F9E
oklch(49.2% 0.124 296.8)
-
Step 800
800
#554180
oklch(42.7% 0.103 296.4)
-
Step 900
900 (this color)
#3F305F
oklch(34.9% 0.081 296.7)
-
Step 950
950
#29213C
oklch(27.1% 0.05 296.6)
#3F305F 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) | #213961 | 0.050 |
| Deuteranopia (no green cones) | #24385E | 0.046 |
| Tritanopia (no blue cones) | #383943 | 0.064 |
| Achromatopsia (no color) | #383838 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F305F
#3F305F
oklch(34.9% 0.081 296.7)
- #383F00
#383F00
oklch(34.9% 0.08 116.6)
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 #3F305F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.064
- Gunmetal #293241 ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.070
- Marine Blue #01386A ΔE 0.072
- Onyx #343A40 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.074
- Marine #042E60 ΔE 0.078
Use #3F305F 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.