#661FA5
Closest named color: Grape (#7209B7). oklch(42.8% 0.196 302.4), rgb(102, 31, 165).
Aa
White text reads best on this color (9.11:1).
About this color
#661FA5 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.196 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape (#7209B7), ΔE 0.038 away. White text reads best on it, at 9.11:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.196) |
| Temperature | in between |
| Nearest name | Grape (#7209B7) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #661FA5 |
| RGB | rgb(102, 31, 165) |
| HSL | hsl(272, 68%, 38%) |
| OKLCH | oklch(42.8% 0.196 302.4) |
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 #661FA5 | 9.11:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #661FA5 | 2.30:1 | Fails | Lc 14.2 | Not readable |
| #661FA5 text on white | 9.11:1 | AAA | Lc 89.8 | Fine for body text |
| #661FA5 text on black | 2.30:1 | Fails | Lc -12.4 | 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
#CFAFFE
oklch(81% 0.114 302.5)
-
Step 400
400
#B780FE
oklch(70.8% 0.183 302.1)
-
Step 500
500
#A757FB
oklch(63.1% 0.234 302.5)
-
Step 600
600
#9331EA
oklch(55.6% 0.254 302.5)
-
Step 700
700
#7D1FCC
oklch(49% 0.237 302.2)
-
Step 800
800 (this color)
#661FA5
oklch(42.8% 0.196 302.4)
-
Step 900
900
#532283
oklch(37.8% 0.154 302.6)
-
Step 950
950
#30164D
oklch(27% 0.097 302)
#661FA5 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) | #0047A9 | 0.136 |
| Deuteranopia (no green cones) | #0048A2 | 0.138 |
| Tritanopia (no blue cones) | #584463 | 0.142 |
| Achromatopsia (no color) | #484848 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #661FA5
#661FA5
oklch(42.8% 0.196 302.4)
- #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 #661FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape #7209B7 ΔE 0.038
- Rebecca Purple #663399 ΔE 0.038
- Chrysanthemum #560BAD ΔE 0.043
- Imperial Purple #480CA8 ΔE 0.068
- Purple Blue #5D21D0 ΔE 0.074
- Violet Blue #510AC9 ΔE 0.077
- Blue With A Hint Of Purple #533CC6 ΔE 0.080
- Bluey Purple #6241C7 ΔE 0.081
Use #661FA5 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.