#3F3563
Closest named color: Prussian Blue (#1D3557). oklch(36.2% 0.078 292), rgb(63, 53, 99).
Aa
White text reads best on this color (11.04:1).
About this color
#3F3563 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.078 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.057 away. White text reads best on it, at 11.04:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.078) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #3F3563 |
| RGB | rgb(63, 53, 99) |
| HSL | hsl(253, 30%, 30%) |
| OKLCH | oklch(36.2% 0.078 292) |
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 #3F3563 | 11.04:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #3F3563 | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #3F3563 text on white | 11.04:1 | AAA | Lc 95.5 | Preferred for body text |
| #3F3563 text on black | 1.90:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D6ED
oklch(88.5% 0.031 291.7)
-
Step 300
300
#C1BAE4
oklch(80.8% 0.059 292.7)
-
Step 400
400
#A296D6
oklch(70.7% 0.093 292.5)
-
Step 500
500
#8B7BCB
oklch(63.1% 0.119 291.8)
-
Step 600
600
#7663B8
oklch(55.7% 0.129 292)
-
Step 700
700
#63519F
oklch(49% 0.122 291.9)
-
Step 800
800
#514381
oklch(42.8% 0.1 292)
-
Step 900
900 (this color)
#3F3563
oklch(36.2% 0.078 292)
-
Step 950
950
#27223C
oklch(27.1% 0.048 291.7)
#3F3563 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) | #263D65 | 0.041 |
| Deuteranopia (no green cones) | #273B62 | 0.039 |
| Tritanopia (no blue cones) | #363E47 | 0.065 |
| Achromatopsia (no color) | #3C3C3C | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3563
#3F3563
oklch(36.2% 0.078 292)
- #3F4103
#3F4103
oklch(36.1% 0.078 111.7)
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 #3F3563, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.067
- Marine Blue #01386A ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.071
- Onyx #343A40 ΔE 0.071
- Twilight Blue #0A437A ΔE 0.071
Use #3F3563 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.