#661B74
Closest named color: Rich Purple (#720058). oklch(38.5% 0.153 320.8), rgb(102, 27, 116).
Aa
White text reads best on this color (10.63:1).
About this color
#661B74 is a dark, vivid purple. In OKLCH its lightness is 39%, 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 0.058 away. White text reads best on it, at 10.63:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Rich Purple (#720058) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #661B74 |
| RGB | rgb(102, 27, 116) |
| HSL | hsl(291, 62%, 28%) |
| OKLCH | oklch(38.5% 0.153 320.8) |
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 #661B74 | 10.63:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #661B74 | 1.97:1 | Fails | Lc 10.2 | Not readable |
| #661B74 text on white | 10.63:1 | AAA | Lc 93.7 | Preferred for body text |
| #661B74 text on black | 1.97:1 | 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
#F4E3F8
oklch(93.6% 0.033 319.8)
-
Step 200
200
#EDCCF3
oklch(88.5% 0.063 321.1)
-
Step 300
300
#E3A8EE
oklch(81% 0.115 321.1)
-
Step 400
400
#D375E5
oklch(70.8% 0.183 321)
-
Step 500
500
#C547DD
oklch(63% 0.235 320.8)
-
Step 600
600
#B115CB
oklch(55.6% 0.256 320.8)
-
Step 700
700
#9700AE
oklch(49% 0.234 320.9)
-
Step 800
800
#7B0B8E
oklch(42.7% 0.197 320.7)
-
Step 900
900 (this color)
#661B74
oklch(38.5% 0.153 320.8)
-
Step 950
950
#3A1143
oklch(27% 0.097 319.9)
#661B74 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) | #003976 | 0.153 |
| Deuteranopia (no green cones) | #254172 | 0.134 |
| Tritanopia (no blue cones) | #672C46 | 0.093 |
| Achromatopsia (no color) | #3E3E3E | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661B74
#661B74
oklch(38.5% 0.153 320.8)
- #0F5300
#0F5300
oklch(38.6% 0.127 140.9)
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 #661B74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Purple #720058 ΔE 0.058
- Purple #800080 ΔE 0.058
- Grape Purple #5D1451 ΔE 0.062
- Velvet #750851 ΔE 0.070
- Rebecca Purple #663399 ΔE 0.073
- Royal Purple #4B006E ΔE 0.073
- Indigo #4B0082 ΔE 0.076
- Dark Magenta #8B008B ΔE 0.084
Use #661B74 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.