#3C0366
Closest named color: Royal Purple (#4B006E). oklch(29.1% 0.149 303), rgb(60, 3, 102).
Aa
White text reads best on this color (15.03:1).
About this color
#3C0366 is a dark, vivid purple. In OKLCH its lightness is 29%, its chroma 0.149 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Royal Purple (#4B006E), ΔE 0.036 away. White text reads best on it, at 15.03:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.39:1 |
| White text | 15.03:1 |
Values
| HEX | #3C0366 |
| RGB | rgb(60, 3, 102) |
| HSL | hsl(275, 94%, 21%) |
| OKLCH | oklch(29.1% 0.149 303) |
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 #3C0366 | 15.03:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #3C0366 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #3C0366 text on white | 15.03:1 | AAA | Lc 100.7 | Preferred for body text |
| #3C0366 text on black | 1.39:1 | 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 950.
-
Step 50
50
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EFE4FF
oklch(93.6% 0.038 304.1)
-
Step 200
200
#E2CFFF
oklch(88.5% 0.068 303.1)
-
Step 300
300
#D0AEFF
oklch(80.9% 0.117 303.1)
-
Step 400
400
#B97EFF
oklch(70.7% 0.188 303)
-
Step 500
500
#A953FF
oklch(63.1% 0.243 302.9)
-
Step 600
600
#9900FA
oklch(55.5% 0.292 302.9)
-
Step 700
700
#8100D4
oklch(49% 0.258 302.9)
-
Step 800
800
#6A00B0
oklch(42.7% 0.224 302.8)
-
Step 900
900
#590095
oklch(37.7% 0.198 302.8)
-
Step 950
950 (this color)
#3C0366
oklch(29.1% 0.149 303)
#3C0366 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) | #002668 | 0.101 |
| Deuteranopia (no green cones) | #002664 | 0.102 |
| Tritanopia (no blue cones) | #332339 | 0.106 |
| Achromatopsia (no color) | #272727 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C0366
#3C0366
oklch(29.1% 0.149 303)
- #253100
#253100
oklch(29.1% 0.072 123.1)
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 #3C0366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.036
- Indigo #4B0082 ΔE 0.057
- Plum Purple #4E0550 ΔE 0.062
- Deep Violet #490648 ΔE 0.066
- Dark Indigo #1F0954 ΔE 0.071
- Eggplant Purple #430541 ΔE 0.072
- Deep Purple #36013F ΔE 0.073
- Dark Purple #35063E ΔE 0.074
Use #3C0366 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.