#66317F
Closest named color: Rebecca Purple (#663399). oklch(41.9% 0.133 313.5), rgb(102, 49, 127).
Aa
White text reads best on this color (9.08:1).
About this color
#66317F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.133 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.043 away. White text reads best on it, at 9.08:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #66317F |
| RGB | rgb(102, 49, 127) |
| HSL | hsl(281, 44%, 35%) |
| OKLCH | oklch(41.9% 0.133 313.5) |
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 #66317F | 9.08:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #66317F | 2.31:1 | Fails | Lc 13.5 | Not readable |
| #66317F text on white | 9.08:1 | AAA | Lc 90.4 | Preferred for body text |
| #66317F text on black | 2.31:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E3D1EE
oklch(88.4% 0.044 312.8)
-
Step 300
300
#D3B2E5
oklch(80.9% 0.079 313.6)
-
Step 400
400
#BC88D7
oklch(70.6% 0.125 313.6)
-
Step 500
500
#AB68CC
oklch(63% 0.159 313.6)
-
Step 600
600
#964DB9
oklch(55.5% 0.173 313.4)
-
Step 700
700
#803DA0
oklch(49.1% 0.162 313.2)
-
Step 800
800 (this color)
#66317F
oklch(41.9% 0.133 313.5)
-
Step 900
900
#552E68
oklch(37.8% 0.104 313.5)
-
Step 950
950
#321B3D
oklch(27% 0.067 313.9)
#66317F 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) | #184681 | 0.121 |
| Deuteranopia (no green cones) | #2E4A7D | 0.106 |
| Tritanopia (no blue cones) | #643F53 | 0.090 |
| Achromatopsia (no color) | #484848 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66317F
#66317F
oklch(41.9% 0.133 313.5)
- #305A00
#305A00
oklch(42% 0.12 133.6)
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 #66317F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.062
- Purple #800080 ΔE 0.073
- Blueberry #464196 ΔE 0.074
- Twilight #4E518B ΔE 0.086
- Light Eggplant #894585 ΔE 0.088
- Dark Magenta #8B008B ΔE 0.088
- Rich Purple #720058 ΔE 0.089
Use #66317F 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.