#661BA9
Closest named color: Grape (#7209B7). oklch(42.8% 0.204 301.6), rgb(102, 27, 169).
Aa
White text reads best on this color (9.15:1).
About this color
#661BA9 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.204 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape (#7209B7), ΔE 0.032 away. White text reads best on it, at 9.15:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.204) |
| Temperature | in between |
| Nearest name | Grape (#7209B7) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #661BA9 |
| RGB | rgb(102, 27, 169) |
| HSL | hsl(272, 72%, 38%) |
| OKLCH | oklch(42.8% 0.204 301.6) |
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 #661BA9 | 9.15:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #661BA9 | 2.29:1 | Fails | Lc 14.2 | Not readable |
| #661BA9 text on white | 9.15:1 | AAA | Lc 89.8 | Fine for body text |
| #661BA9 text on black | 2.29:1 | Fails | Lc -12.5 | 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
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EEE5FE
oklch(93.6% 0.035 302.1)
-
Step 200
200
#E1D0FE
oklch(88.6% 0.065 301.9)
-
Step 300
300
#CEAFFF
oklch(80.9% 0.115 301.7)
-
Step 400
400
#B680FF
oklch(70.7% 0.184 301.5)
-
Step 500
500
#A656FF
oklch(63.1% 0.239 301.5)
-
Step 600
600
#932BF0
oklch(55.6% 0.264 301.6)
-
Step 700
700
#7D18D1
oklch(49.1% 0.246 301.4)
-
Step 800
800 (this color)
#661BA9
oklch(42.8% 0.204 301.6)
-
Step 900
900
#522086
oklch(37.6% 0.159 301.3)
-
Step 950
950
#30154E
oklch(27% 0.1 301.7)
#661BA9 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) | #0047AD | 0.137 |
| Deuteranopia (no green cones) | #0047A6 | 0.138 |
| Tritanopia (no blue cones) | #574464 | 0.148 |
| Achromatopsia (no color) | #484848 | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661BA9
#661BA9
oklch(42.8% 0.204 301.6)
- #465700
#465700
oklch(42.7% 0.103 121.8)
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 #661BA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape #7209B7 ΔE 0.032
- Chrysanthemum #560BAD ΔE 0.039
- Rebecca Purple #663399 ΔE 0.045
- Imperial Purple #480CA8 ΔE 0.066
- Purple Blue #5D21D0 ΔE 0.068
- Violet Blue #510AC9 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.079
- Bluey Purple #6241C7 ΔE 0.080
Use #661BA9 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.