#661CA6
Closest named color: Grape (#7209B7). oklch(42.6% 0.2 302.4), rgb(102, 28, 166).
Aa
White text reads best on this color (9.20:1).
About this color
#661CA6 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.200 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape (#7209B7), ΔE 0.036 away. White text reads best on it, at 9.20:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Grape (#7209B7) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #661CA6 |
| RGB | rgb(102, 28, 166) |
| HSL | hsl(272, 71%, 38%) |
| OKLCH | oklch(42.6% 0.2 302.4) |
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 #661CA6 | 9.20:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #661CA6 | 2.28:1 | Fails | Lc 14.0 | Not readable |
| #661CA6 text on white | 9.20:1 | AAA | Lc 90.0 | Fine for body text |
| #661CA6 text on black | 2.28:1 | Fails | Lc -12.3 | 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
#F7F3FE
oklch(97% 0.015 302.6)
-
Step 100
100
#EEE5FD
oklch(93.6% 0.033 302.7)
-
Step 200
200
#E1D0FD
oklch(88.6% 0.064 302.3)
-
Step 300
300
#CFAEFF
oklch(80.8% 0.117 302.6)
-
Step 400
400
#B87FFF
oklch(70.8% 0.186 302.5)
-
Step 500
500
#A755FD
oklch(63% 0.239 302.4)
-
Step 600
600
#942EED
oklch(55.7% 0.26 302.4)
-
Step 700
700
#7E1BCE
oklch(49.1% 0.242 302.3)
-
Step 800
800 (this color)
#661CA6
oklch(42.6% 0.2 302.4)
-
Step 900
900
#532184
oklch(37.7% 0.156 302.4)
-
Step 950
950
#30154D
oklch(26.9% 0.099 302.3)
#661CA6 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) | #0047AA | 0.138 |
| Deuteranopia (no green cones) | #0047A3 | 0.139 |
| Tritanopia (no blue cones) | #584363 | 0.143 |
| Achromatopsia (no color) | #484848 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661CA6
#661CA6
oklch(42.6% 0.2 302.4)
- #455700
#455700
oklch(42.6% 0.104 122.4)
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 #661CA6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape #7209B7 ΔE 0.036
- Chrysanthemum #560BAD ΔE 0.041
- Rebecca Purple #663399 ΔE 0.042
- Imperial Purple #480CA8 ΔE 0.067
- Purple Blue #5D21D0 ΔE 0.073
- Violet Blue #510AC9 ΔE 0.076
- Blue With A Hint Of Purple #533CC6 ΔE 0.081
- Bluey Purple #6241C7 ΔE 0.082
Use #661CA6 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.