#66408A
Closest named color: Rebecca Purple (#663399). oklch(45% 0.122 305.8), rgb(102, 64, 138).
Aa
White text reads best on this color (7.87:1).
About this color
#66408A is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.122 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.040 away. White text reads best on it, at 7.87:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #66408A |
| RGB | rgb(102, 64, 138) |
| HSL | hsl(271, 37%, 40%) |
| OKLCH | oklch(45% 0.122 305.8) |
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 #66408A | 7.87:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #66408A | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #66408A text on white | 7.87:1 | AAA | Lc 87.1 | Fine for body text |
| #66408A text on black | 2.66:1 | Fails | Lc -15.0 | Dividers and decoration only |
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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#DFD3EE
oklch(88.5% 0.039 305.6)
-
Step 300
300
#CCB5E6
oklch(80.9% 0.072 306.1)
-
Step 400
400
#B28ED9
oklch(70.8% 0.113 305.7)
-
Step 500
500
#9F6FCF
oklch(63% 0.147 305.7)
-
Step 600
600
#8A56BB
oklch(55.6% 0.157 305.7)
-
Step 700
700
#7545A2
oklch(49% 0.148 305.4)
-
Step 800
800 (this color)
#66408A
oklch(45% 0.122 305.8)
-
Step 900
900
#4E3269
oklch(37.7% 0.095 305.8)
-
Step 950
950
#2E1E3E
oklch(27.1% 0.061 305.8)
#66408A 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) | #29508D | 0.094 |
| Deuteranopia (no green cones) | #355288 | 0.085 |
| Tritanopia (no blue cones) | #604D5F | 0.088 |
| Achromatopsia (no color) | #515151 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66408A
#66408A
oklch(45% 0.122 305.8)
- #466000
#466000
oklch(45.1% 0.115 125.8)
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 #66408A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.055
- Twilight #4E518B ΔE 0.057
- Blueberry #464196 ΔE 0.059
- Dusk #4E5481 ΔE 0.068
- Light Eggplant #894585 ΔE 0.071
- Dusty Grape #545775 ΔE 0.082
- Dusky Blue #475F94 ΔE 0.090
Use #66408A 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.