#666174
Closest named color: Slate (#516572). oklch(50.4% 0.03 297.3), rgb(102, 97, 116).
Aa
White text reads best on this color (5.95:1).
About this color
#666174 is a medium-dark, muted purple. In OKLCH its lightness is 50%, its chroma 0.030 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 5.95:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.030) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #666174 |
| RGB | rgb(102, 97, 116) |
| HSL | hsl(256, 9%, 42%) |
| OKLCH | oklch(50.4% 0.03 297.3) |
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 #666174 | 5.95:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #666174 | 3.52:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #666174 text on white | 5.95:1 | AA | Lc 79.8 | Fine for body text |
| #666174 text on black | 3.52:1 | AA large text | Lc -22.0 | 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 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
#C1BFC9
oklch(80.9% 0.014 295.3)
-
Step 400
400
#A29EAE
oklch(70.8% 0.023 297.2)
-
Step 500
500
#8B869A
oklch(63.1% 0.03 297)
-
Step 600
600
#757085
oklch(55.7% 0.033 296.2)
-
Step 700
700 (this color)
#666174
oklch(50.4% 0.03 297.3)
-
Step 800
800
#504C5B
oklch(42.6% 0.025 297.5)
-
Step 900
900
#42404B
oklch(37.8% 0.019 293.8)
-
Step 950
950
#27252C
oklch(27% 0.013 298.6)
#666174 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) | #5D6475 | 0.015 |
| Deuteranopia (no green cones) | #5E6373 | 0.014 |
| Tritanopia (no blue cones) | #646467 | 0.026 |
| Achromatopsia (no color) | #646464 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666174
#666174
oklch(50.4% 0.03 297.3)
- #636753
#636753
oklch(50.4% 0.031 116.7)
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 #666174, 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 0.035
- Dusty Grape #545775 ΔE 0.044
- Dusty Purple #825F87 ΔE 0.058
- Dull Purple #84597E ΔE 0.058
- Muted Purple #805B87 ΔE 0.058
- Battleship Gray #6C757D ΔE 0.059
- Metallic Blue #4F738E ΔE 0.060
Use #666174 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.