#3F209C
Closest named color: Imperial Purple (#480CA8). oklch(37.6% 0.184 284.8), rgb(63, 32, 156).
Aa
White text reads best on this color (11.06:1).
About this color
#3F209C is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.184 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Imperial Purple (#480CA8), ΔE 0.029 away. White text reads best on it, at 11.06:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Imperial Purple (#480CA8) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #3F209C |
| RGB | rgb(63, 32, 156) |
| HSL | hsl(255, 66%, 37%) |
| OKLCH | oklch(37.6% 0.184 284.8) |
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 #3F209C | 11.06:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #3F209C | 1.89:1 | Fails | Lc 9.3 | Not readable |
| #3F209C text on white | 11.06:1 | AAA | Lc 94.6 | Preferred for body text |
| #3F209C text on black | 1.89:1 | Fails | Lc -8.0 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E7FF
oklch(93.5% 0.032 285.8)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#978FFF
oklch(70.6% 0.16 284.8)
-
Step 500
500
#816EFF
oklch(63.1% 0.207 284.7)
-
Step 600
600
#6F44FF
oklch(55.6% 0.257 285)
-
Step 700
700
#6106F6
oklch(49.1% 0.285 284.9)
-
Step 800
800
#4E15C7
oklch(42.7% 0.236 284.7)
-
Step 900
900 (this color)
#3F209C
oklch(37.6% 0.184 284.8)
-
Step 950
950
#24165B
oklch(26.9% 0.116 284.8)
#3F209C 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) | #003F9F | 0.080 |
| Deuteranopia (no green cones) | #00389A | 0.073 |
| Tritanopia (no blue cones) | #06445E | 0.151 |
| Achromatopsia (no color) | #3C3C3C | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F209C
#3F209C
oklch(37.6% 0.184 284.8)
- #484300
#484300
oklch(37.6% 0.08 104.8)
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 #3F209C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Purple #480CA8 ΔE 0.029
- Indigo Blue #3A18B1 ΔE 0.037
- Chrysanthemum #560BAD ΔE 0.052
- Sapphire #2138AB ΔE 0.063
- Indigo #4B0082 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.070
- Blueberry #464196 ΔE 0.072
- Ultramarine #2000B1 ΔE 0.073
Use #3F209C 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.