#66617C
Closest named color: Slate (#516572). oklch(50.7% 0.043 293.3), rgb(102, 97, 124).
Aa
White text reads best on this color (5.88:1).
About this color
#66617C is a medium-dark, muted purple. In OKLCH its lightness is 51%, its chroma 0.043 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.039 away. White text reads best on it, at 5.88:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.043) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #66617C |
| RGB | rgb(102, 97, 124) |
| HSL | hsl(251, 12%, 43%) |
| OKLCH | oklch(50.7% 0.043 293.3) |
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 #66617C | 5.88:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #66617C | 3.56:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #66617C text on white | 5.88:1 | AA | Lc 79.5 | Fine for body text |
| #66617C text on black | 3.56:1 | AA large text | Lc -22.3 | 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 700.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#D9D8E0
oklch(88.5% 0.011 291.9)
-
Step 300
300
#C1BECD
oklch(80.9% 0.021 295.1)
-
Step 400
400
#A19DB4
oklch(70.7% 0.033 293.5)
-
Step 500
500
#8A85A1
oklch(63.1% 0.042 293.3)
-
Step 600
600
#746F8C
oklch(55.7% 0.045 292.8)
-
Step 700
700 (this color)
#66617C
oklch(50.7% 0.043 293.3)
-
Step 800
800
#4F4C61
oklch(42.8% 0.035 291.4)
-
Step 900
900
#423F4F
oklch(37.7% 0.027 293.6)
-
Step 950
950
#27252E
oklch(27% 0.017 295.4)
#66617C 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) | #5B657D | 0.019 |
| Deuteranopia (no green cones) | #5B647B | 0.018 |
| Tritanopia (no blue cones) | #62656A | 0.036 |
| Achromatopsia (no color) | #646464 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66617C
#66617C
oklch(50.7% 0.043 293.3)
- #65684C
#65684C
oklch(50.7% 0.042 112.9)
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 #66617C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.039
- Dusty Grape #545775 ΔE 0.043
- Dim Gray #696969 ΔE 0.045
- Muted Purple #805B87 ΔE 0.051
- Dusty Purple #825F87 ΔE 0.051
- Dull Purple #84597E ΔE 0.054
- Metallic Blue #4F738E ΔE 0.057
- Dusk #4E5481 ΔE 0.058
Use #66617C 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.