#3F2982
Closest named color: Dark Slate Blue (#483D8B). oklch(36.4% 0.142 288.7), rgb(63, 41, 130).
Aa
White text reads best on this color (11.34:1).
About this color
#3F2982 is a dark, vivid purple. In OKLCH its lightness is 36%, its chroma 0.142 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 11.34:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #3F2982 |
| RGB | rgb(63, 41, 130) |
| HSL | hsl(255, 52%, 34%) |
| OKLCH | oklch(36.4% 0.142 288.7) |
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 #3F2982 | 11.34:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #3F2982 | 1.85:1 | Fails | Lc 8.2 | Not readable |
| #3F2982 text on white | 11.34:1 | AAA | Lc 95.7 | Preferred for body text |
| #3F2982 text on black | 1.85:1 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E8E7FE
oklch(93.6% 0.031 287.8)
-
Step 200
200
#D7D4FF
oklch(88.6% 0.059 288.3)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9E8CFF
oklch(70.6% 0.164 288.7)
-
Step 500
500
#8A6AFF
oklch(63.2% 0.212 288.7)
-
Step 600
600
#7649F1
oklch(55.6% 0.236 288.6)
-
Step 700
700
#6438D2
oklch(49.2% 0.219 288.7)
-
Step 800
800
#5130AA
oklch(42.7% 0.182 288.6)
-
Step 900
900 (this color)
#3F2982
oklch(36.4% 0.142 288.7)
-
Step 950
950
#261C4F
oklch(27.1% 0.09 287.9)
#3F2982 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) | #003C85 | 0.075 |
| Deuteranopia (no green cones) | #003880 | 0.073 |
| Tritanopia (no blue cones) | #283F52 | 0.115 |
| Achromatopsia (no color) | #3A3A3A | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2982
#3F2982
oklch(36.4% 0.142 288.7)
- #424100
#424100
oklch(36.4% 0.079 108.8)
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 #3F2982, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Indigo #4B0082 ΔE 0.058
- Blueberry #464196 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.070
- Royal Purple #4B006E ΔE 0.074
- Indigo Blue #3A18B1 ΔE 0.081
- Cobalt #1E488F ΔE 0.084
- Sapphire #2138AB ΔE 0.085
Use #3F2982 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.