#66617D
Closest named color: Slate (#516572). oklch(50.8% 0.044 292.9), rgb(102, 97, 125).
Aa
White text reads best on this color (5.88:1).
About this color
#66617D is a medium-dark, muted purple. In OKLCH its lightness is 51%, its chroma 0.044 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.040 away. White text reads best on it, at 5.88:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.044) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.57:1 |
| White text | 5.88:1 |
Values
| HEX | #66617D |
| RGB | rgb(102, 97, 125) |
| HSL | hsl(251, 13%, 44%) |
| OKLCH | oklch(50.8% 0.044 292.9) |
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 #66617D | 5.88:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #66617D | 3.57:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #66617D text on white | 5.88:1 | AA | Lc 79.4 | Fine for body text |
| #66617D text on black | 3.57:1 | AA large text | Lc -22.4 | 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
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#D9D8E0
oklch(88.5% 0.011 291.9)
-
Step 300
300
#C1BECE
oklch(80.9% 0.022 294.5)
-
Step 400
400
#A19DB5
oklch(70.7% 0.035 293.1)
-
Step 500
500
#8A85A2
oklch(63.1% 0.043 293)
-
Step 600
600
#746E8D
oklch(55.5% 0.048 293.6)
-
Step 700
700 (this color)
#66617D
oklch(50.8% 0.044 292.9)
-
Step 800
800
#4F4B62
oklch(42.6% 0.038 292.7)
-
Step 900
900
#423F50
oklch(37.7% 0.029 293.1)
-
Step 950
950
#27252F
oklch(27.1% 0.019 294.3)
#66617D 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) | #5B657E | 0.019 |
| Deuteranopia (no green cones) | #5B647C | 0.018 |
| Tritanopia (no blue cones) | #62656B | 0.036 |
| Achromatopsia (no color) | #646464 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66617D
#66617D
oklch(50.8% 0.044 292.9)
- #65684B
#65684B
oklch(50.7% 0.044 112.8)
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 #66617D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.040
- Dusty Grape #545775 ΔE 0.043
- Dim Gray #696969 ΔE 0.046
- Muted Purple #805B87 ΔE 0.050
- Dusty Purple #825F87 ΔE 0.050
- Dull Purple #84597E ΔE 0.053
- Metallic Blue #4F738E ΔE 0.056
- Dusk #4E5481 ΔE 0.058
Use #66617D 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.