#661B73
Closest named color: Rich Purple (#720058). oklch(38.5% 0.153 321.3), rgb(102, 27, 115).
Aa
White text reads best on this color (10.66:1).
About this color
#661B73 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.153 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Purple (#720058), ΔE 0.057 away. White text reads best on it, at 10.66:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Rich Purple (#720058) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #661B73 |
| RGB | rgb(102, 27, 115) |
| HSL | hsl(291, 62%, 28%) |
| OKLCH | oklch(38.5% 0.153 321.3) |
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 #661B73 | 10.66:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #661B73 | 1.96:1 | Fails | Lc 10.2 | Not readable |
| #661B73 text on white | 10.66:1 | AAA | Lc 93.7 | Preferred for body text |
| #661B73 text on black | 1.96:1 | Fails | Lc -8.8 | 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
#FAF2FC
oklch(97% 0.016 319.4)
-
Step 100
100
#F5E3F8
oklch(93.6% 0.034 321.4)
-
Step 200
200
#EDCCF3
oklch(88.5% 0.063 321.1)
-
Step 300
300
#E3A8ED
oklch(80.9% 0.114 321.5)
-
Step 400
400
#D375E4
oklch(70.7% 0.182 321.3)
-
Step 500
500
#C647DC
oklch(63.1% 0.234 321.4)
-
Step 600
600
#B116C9
oklch(55.5% 0.254 321.4)
-
Step 700
700
#9800AD
oklch(49.1% 0.234 321.5)
-
Step 800
800
#7C0B8D
oklch(42.7% 0.196 321.5)
-
Step 900
900 (this color)
#661B73
oklch(38.5% 0.153 321.3)
-
Step 950
950
#3B1142
oklch(27.1% 0.097 321.7)
#661B73 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) | #003975 | 0.153 |
| Deuteranopia (no green cones) | #264171 | 0.133 |
| Tritanopia (no blue cones) | #672C45 | 0.093 |
| Achromatopsia (no color) | #3E3E3E | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661B73
#661B73
oklch(38.5% 0.153 321.3)
- #0C5300
#0C5300
oklch(38.5% 0.127 141.2)
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 #661B73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Purple #720058 ΔE 0.057
- Purple #800080 ΔE 0.059
- Grape Purple #5D1451 ΔE 0.061
- Velvet #750851 ΔE 0.068
- Royal Purple #4B006E ΔE 0.073
- Rebecca Purple #663399 ΔE 0.074
- Indigo #4B0082 ΔE 0.077
- Dark Magenta #8B008B ΔE 0.085
Use #661B73 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.