#66316D
Closest named color: Rebecca Purple (#663399). oklch(40.8% 0.114 322.8), rgb(102, 49, 109).
Aa
White text reads best on this color (9.43:1).
About this color
#66316D is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.114 and its hue 323°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.073 away. White text reads best on it, at 9.43:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #66316D |
| RGB | rgb(102, 49, 109) |
| HSL | hsl(293, 38%, 31%) |
| OKLCH | oklch(40.8% 0.114 322.8) |
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 #66316D | 9.43:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #66316D | 2.22:1 | Fails | Lc 12.5 | Not readable |
| #66316D text on white | 9.43:1 | AAA | Lc 91.4 | Preferred for body text |
| #66316D text on black | 2.22:1 | Fails | Lc -10.9 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#F0E6F1
oklch(93.6% 0.018 323)
-
Step 200
200
#E5D1E8
oklch(88.4% 0.038 321.8)
-
Step 300
300
#D6B3DA
oklch(81% 0.066 322.9)
-
Step 400
400
#C08AC7
oklch(70.7% 0.105 322.6)
-
Step 500
500
#B06BB9
oklch(63.1% 0.136 322.8)
-
Step 600
600
#9B51A5
oklch(55.6% 0.148 322.7)
-
Step 700
700
#84418D
oklch(49% 0.137 322.8)
-
Step 800
800 (this color)
#66316D
oklch(40.8% 0.114 322.8)
-
Step 900
900
#57305D
oklch(37.7% 0.088 322.1)
-
Step 950
950
#331C36
oklch(26.9% 0.056 322.8)
#66316D 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) | #28426F | 0.108 |
| Deuteranopia (no green cones) | #39486B | 0.095 |
| Tritanopia (no blue cones) | #68394A | 0.069 |
| Achromatopsia (no color) | #464646 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66316D
#66316D
oklch(40.8% 0.114 322.8)
- #1B591A
#1B591A
oklch(41% 0.114 142.9)
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 #66316D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.073
- Grape Purple #5D1451 ΔE 0.073
- Rich Purple #720058 ΔE 0.074
- Velvet #750851 ΔE 0.074
- Dark Slate Blue #483D8B ΔE 0.076
- Purple #800080 ΔE 0.082
- Brownish Purple #76424E ΔE 0.086
- Purple Brown #673A3F ΔE 0.088
Use #66316D 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.