#666278
Closest named color: Slate (#516572). oklch(50.8% 0.035 293.5), rgb(102, 98, 120).
Aa
White text reads best on this color (5.86:1).
About this color
#666278 is a medium-dark, muted purple. In OKLCH its lightness is 51%, its chroma 0.035 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.034 away. White text reads best on it, at 5.86:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #666278 |
| RGB | rgb(102, 98, 120) |
| HSL | hsl(251, 10%, 43%) |
| OKLCH | oklch(50.8% 0.035 293.5) |
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 #666278 | 5.86:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #666278 | 3.58:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #666278 text on white | 5.86:1 | AA | Lc 79.3 | Fine for body text |
| #666278 text on black | 3.58:1 | AA large text | Lc -22.5 | 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
#D9D8DF
oklch(88.5% 0.01 292.8)
-
Step 300
300
#C1BFCB
oklch(81% 0.017 293.7)
-
Step 400
400
#A19EB0
oklch(70.8% 0.026 293.4)
-
Step 500
500
#8A869D
oklch(63.1% 0.034 293.4)
-
Step 600
600
#746F88
oklch(55.5% 0.039 294.3)
-
Step 700
700 (this color)
#666278
oklch(50.8% 0.035 293.5)
-
Step 800
800
#4F4C5E
oklch(42.6% 0.03 292.7)
-
Step 900
900
#423F4D
oklch(37.6% 0.024 295)
-
Step 950
950
#27252D
oklch(27% 0.015 296.8)
#666278 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) | #5D6579 | 0.015 |
| Deuteranopia (no green cones) | #5E6477 | 0.013 |
| Tritanopia (no blue cones) | #636569 | 0.029 |
| Achromatopsia (no color) | #656565 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666278
#666278
oklch(50.8% 0.035 293.5)
- #656851
#656851
oklch(50.8% 0.035 113.7)
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 #666278, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.034
- Dim Gray #696969 ΔE 0.037
- Dusty Grape #545775 ΔE 0.045
- Dusty Purple #825F87 ΔE 0.054
- Muted Purple #805B87 ΔE 0.055
- Metallic Blue #4F738E ΔE 0.056
- Battleship Gray #6C757D ΔE 0.056
- Dull Purple #84597E ΔE 0.056
Use #666278 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.