#666175
Closest named color: Slate (#516572). oklch(50.4% 0.032 296.7), rgb(102, 97, 117).
Aa
White text reads best on this color (5.94:1).
About this color
#666175 is a medium-dark, muted purple. In OKLCH its lightness is 50%, its chroma 0.032 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.033 away. White text reads best on it, at 5.94:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #666175 |
| RGB | rgb(102, 97, 117) |
| HSL | hsl(255, 9%, 42%) |
| OKLCH | oklch(50.4% 0.032 296.7) |
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 #666175 | 5.94:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #666175 | 3.53:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #666175 text on white | 5.94:1 | AA | Lc 79.7 | Fine for body text |
| #666175 text on black | 3.53:1 | AA large text | Lc -22.1 | 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
#EAE9EC
oklch(93.6% 0.004 301.4)
-
Step 200
200
#D9D8DE
oklch(88.5% 0.008 293.9)
-
Step 300
300
#C1BFCA
oklch(81% 0.015 294.4)
-
Step 400
400
#A29EAF
oklch(70.8% 0.025 296.5)
-
Step 500
500
#8B869B
oklch(63.1% 0.032 296.4)
-
Step 600
600
#756F85
oklch(55.5% 0.034 297.8)
-
Step 700
700 (this color)
#666175
oklch(50.4% 0.032 296.7)
-
Step 800
800
#504C5C
oklch(42.6% 0.027 296.7)
-
Step 900
900
#423F4B
oklch(37.5% 0.021 296.8)
-
Step 950
950
#27252C
oklch(27% 0.013 298.6)
#666175 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) | #5D6476 | 0.015 |
| Deuteranopia (no green cones) | #5E6374 | 0.014 |
| Tritanopia (no blue cones) | #636468 | 0.026 |
| Achromatopsia (no color) | #646464 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666175
#666175
oklch(50.4% 0.032 296.7)
- #636752
#636752
oklch(50.4% 0.032 116.3)
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 #666175, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.033
- Dim Gray #696969 ΔE 0.036
- Dusty Grape #545775 ΔE 0.043
- Dusty Purple #825F87 ΔE 0.057
- Muted Purple #805B87 ΔE 0.057
- Dull Purple #84597E ΔE 0.057
- Battleship Gray #6C757D ΔE 0.059
- Metallic Blue #4F738E ΔE 0.060
Use #666175 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.