#3F367D
Closest named color: Dark Slate Blue (#483D8B). oklch(38.2% 0.116 285.3), rgb(63, 54, 125).
Aa
White text reads best on this color (10.31:1).
About this color
#3F367D is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.116 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 10.31:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.31:1 |
Values
| HEX | #3F367D |
| RGB | rgb(63, 54, 125) |
| HSL | hsl(248, 40%, 35%) |
| OKLCH | oklch(38.2% 0.116 285.3) |
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 #3F367D | 10.31:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #3F367D | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #3F367D text on white | 10.31:1 | AAA | Lc 93.7 | Preferred for body text |
| #3F367D text on black | 2.03:1 | Fails | Lc -8.8 | 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
#F4F4FD
oklch(97% 0.012 286.2)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D5D5F9
oklch(88.4% 0.049 285.3)
-
Step 300
300
#BAB9F7
oklch(80.8% 0.087 285)
-
Step 400
400
#9992F3
oklch(70.6% 0.14 285.5)
-
Step 500
500
#8274EF
oklch(63.1% 0.178 285.3)
-
Step 600
600
#6D59DD
oklch(55.6% 0.193 285.2)
-
Step 700
700
#5C48C0
oklch(49.2% 0.18 285.3)
-
Step 800
800
#4B3C9B
oklch(42.7% 0.148 285.5)
-
Step 900
900 (this color)
#3F367D
oklch(38.2% 0.116 285.3)
-
Step 950
950
#241F48
oklch(26.9% 0.074 285.9)
#3F367D 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) | #0E427F | 0.059 |
| Deuteranopia (no green cones) | #0B3E7B | 0.060 |
| Tritanopia (no blue cones) | #2A4654 | 0.098 |
| Achromatopsia (no color) | #404040 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F367D
#3F367D
oklch(38.2% 0.116 285.3)
- #4A4500
#4A4500
oklch(38.3% 0.081 104.9)
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 #3F367D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.050
- Cobalt #1E488F ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Marine Blue #01386A ΔE 0.076
- Light Navy #155084 ΔE 0.079
- Twilight #4E518B ΔE 0.081
- Dusk Blue #26538D ΔE 0.082
Use #3F367D 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.