#66037D
Closest named color: Purple (#800080). oklch(37.7% 0.18 317.9), rgb(102, 3, 125).
Aa
White text reads best on this color (11.20:1).
About this color
#66037D is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.180 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple (#800080), ΔE 0.057 away. White text reads best on it, at 11.20:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.180) |
| Temperature | in between |
| Nearest name | Purple (#800080) |
| Black text | 1.87:1 |
| White text | 11.20:1 |
Values
| HEX | #66037D |
| RGB | rgb(102, 3, 125) |
| HSL | hsl(289, 95%, 25%) |
| OKLCH | oklch(37.7% 0.18 317.9) |
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 #66037D | 11.20:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #66037D | 1.87:1 | Fails | Lc 9.9 | Not readable |
| #66037D text on white | 11.20:1 | AAA | Lc 94.0 | Preferred for body text |
| #66037D text on black | 1.87:1 | Fails | Lc -8.6 | 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
#FBF2FE
oklch(97.2% 0.018 317.7)
-
Step 100
100
#F5E2FB
oklch(93.5% 0.039 318.1)
-
Step 200
200
#EECAFA
oklch(88.5% 0.075 317.6)
-
Step 300
300
#E5A4F9
oklch(80.9% 0.135 318)
-
Step 400
400
#D66BF6
oklch(70.7% 0.216 317.8)
-
Step 500
500
#CA30F2
oklch(63.2% 0.276 317.9)
-
Step 600
600
#AF00D5
oklch(55.5% 0.269 317.9)
-
Step 700
700
#9400B5
oklch(49.1% 0.238 317.8)
-
Step 800
800
#7A0095
oklch(42.6% 0.207 318)
-
Step 900
900 (this color)
#66037D
oklch(37.7% 0.18 317.9)
-
Step 950
950
#3C0A49
oklch(27% 0.114 318.1)
#66037D 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) | #003680 | 0.162 |
| Deuteranopia (no green cones) | #093E7B | 0.163 |
| Tritanopia (no blue cones) | #652747 | 0.112 |
| Achromatopsia (no color) | #3B3B3B | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66037D
#66037D
oklch(37.7% 0.18 317.9)
- #1C4F00
#1C4F00
oklch(37.8% 0.117 138)
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 #66037D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple #800080 ΔE 0.057
- Indigo #4B0082 ΔE 0.063
- Royal Purple #4B006E ΔE 0.065
- Rich Purple #720058 ΔE 0.072
- Grape Purple #5D1451 ΔE 0.079
- Rebecca Purple #663399 ΔE 0.079
- Dark Magenta #8B008B ΔE 0.082
- Velvet #750851 ΔE 0.088
Use #66037D 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.