#3F315D
Closest named color: Prussian Blue (#1D3557). oklch(35% 0.076 297), rgb(63, 49, 93).
Aa
White text reads best on this color (11.61:1).
About this color
#3F315D is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.076 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 0.054 away. White text reads best on it, at 11.61:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.80:1 |
| White text | 11.61:1 |
Values
| HEX | #3F315D |
| RGB | rgb(63, 49, 93) |
| HSL | hsl(259, 31%, 28%) |
| OKLCH | oklch(35% 0.076 297) |
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 #3F315D | 11.61:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #3F315D | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #3F315D text on white | 11.61:1 | AAA | Lc 96.6 | Preferred for body text |
| #3F315D text on black | 1.80:1 | 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
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4BAE2
oklch(81% 0.057 296.6)
-
Step 400
400
#A695D3
oklch(70.7% 0.091 296.6)
-
Step 500
500
#9179C7
oklch(63% 0.117 297.1)
-
Step 600
600
#7C61B4
oklch(55.6% 0.127 297.1)
-
Step 700
700
#68509B
oklch(49.1% 0.118 296.6)
-
Step 800
800
#55427D
oklch(42.7% 0.097 297)
-
Step 900
900 (this color)
#3F315D
oklch(35% 0.076 297)
-
Step 950
950
#29213B
oklch(27% 0.048 297.2)
#3F315D 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) | #24395F | 0.045 |
| Deuteranopia (no green cones) | #26385C | 0.043 |
| Tritanopia (no blue cones) | #393942 | 0.061 |
| Achromatopsia (no color) | #393939 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F315D
#3F315D
oklch(35% 0.076 297)
- #383F06
#383F06
oklch(34.9% 0.076 116.8)
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 #3F315D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.066
- Onyx #343A40 ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.070
- Marine Blue #01386A ΔE 0.072
- Marine #042E60 ΔE 0.078
Use #3F315D 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.