#666879
Closest named color: Dim Gray (#696969). oklch(52.2% 0.027 280.1), rgb(102, 104, 121).
Aa
White text reads best on this color (5.49:1).
About this color
#666879 is a medium-dark close to neutral grey. In OKLCH its lightness is 52%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.027 away. White text reads best on it, at 5.49:1.
| Hue family | Neutrals |
| Lightness | medium-dark (52%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #666879 |
| RGB | rgb(102, 104, 121) |
| HSL | hsl(234, 9%, 44%) |
| OKLCH | oklch(52.2% 0.027 280.1) |
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 #666879 | 5.49:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #666879 | 3.82:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #666879 text on white | 5.49:1 | AA | Lc 77.5 | Fine for body text |
| #666879 text on black | 3.82:1 | AA large text | Lc -24.3 | 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
#E9E9EC
oklch(93.5% 0.004 286.3)
-
Step 200
200
#D8D9DE
oklch(88.6% 0.007 277.2)
-
Step 300
300
#BFC0C9
oklch(81% 0.013 281)
-
Step 400
400
#9E9FAE
oklch(70.7% 0.022 282.8)
-
Step 500
500
#86889A
oklch(63.1% 0.027 280.6)
-
Step 600
600
#707284
oklch(55.7% 0.028 280.4)
-
Step 700
700 (this color)
#666879
oklch(52.2% 0.027 280.1)
-
Step 800
800
#4C4E5B
oklch(42.7% 0.022 278.5)
-
Step 900
900
#40414B
oklch(37.8% 0.017 281)
-
Step 950
950
#25262C
oklch(27% 0.011 278.1)
#666879 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) | #646A7A | 0.006 |
| Deuteranopia (no green cones) | #636879 | 0.004 |
| Tritanopia (no blue cones) | #626B6E | 0.023 |
| Achromatopsia (no color) | #696969 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666879
#666879
oklch(52.2% 0.027 280.1)
- #6D6A58
#6D6A58
oklch(52.2% 0.027 99.4)
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 #666879, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.027
- Slate #516572 ΔE 0.034
- Battleship Gray #6C757D ΔE 0.039
- Metallic Blue #4F738E ΔE 0.045
- Grey Purple #826D8C ΔE 0.056
- Battleship Grey #6B7C85 ΔE 0.058
- Dusty Purple #825F87 ΔE 0.059
- Purple Grey #866F85 ΔE 0.059
Use #666879 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.