#66747B
Closest named color: Battleship Gray (#6C757D). oklch(55% 0.02 229.3), rgb(102, 116, 123).
Aa
White text reads best on this color (4.82:1).
About this color
#66747B is a medium-dark close to neutral grey. In OKLCH its lightness is 55%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Battleship Gray (#6C757D), ΔE 0.010 away. White text reads best on it, at 4.82:1.
| Hue family | Neutrals |
| Lightness | medium-dark (55%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.34:1 |
| White text | 4.82:1 |
Values
| HEX | #66747B |
| RGB | rgb(102, 116, 123) |
| HSL | hsl(200, 9%, 44%) |
| OKLCH | oklch(55% 0.02 229.3) |
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 #66747B | 4.82:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #66747B | 4.34:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #66747B text on white | 4.82:1 | AA | Lc 73.5 | Content text, not long reading |
| #66747B text on black | 4.34:1 | AA large text | Lc -28.2 | 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 600.
-
Step 50
50
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D6DADC
oklch(88.6% 0.005 228.8)
-
Step 300
300
#BBC2C5
oklch(80.9% 0.009 225.1)
-
Step 400
400
#98A2A8
oklch(70.6% 0.014 233.8)
-
Step 500
500
#7F8C92
oklch(63.2% 0.018 227.1)
-
Step 600
600 (this color)
#66747B
oklch(55% 0.02 229.3)
-
Step 700
700
#566369
oklch(49.1% 0.019 227.3)
-
Step 800
800
#475156
oklch(42.8% 0.015 229.3)
-
Step 900
900
#3B4347
oklch(37.7% 0.013 229.2)
-
Step 950
950
#232729
oklch(27% 0.007 229.1)
#66747B 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) | #70737B | 0.014 |
| Deuteranopia (no green cones) | #6D717B | 0.013 |
| Tritanopia (no blue cones) | #607676 | 0.014 |
| Achromatopsia (no color) | #727272 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66747B
#66747B
oklch(55% 0.02 229.3)
- #7C6E67
#7C6E67
oklch(54.9% 0.021 48.3)
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 #66747B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.010
- Battleship Grey #6B7C85 ΔE 0.026
- Grey Blue #647D8E ΔE 0.033
- Dim Gray #696969 ΔE 0.035
- Metallic Blue #4F738E ΔE 0.041
- Steel Grey #6F828A ΔE 0.045
- Slate Gray #708090 ΔE 0.045
- Medium Grey #7D7F7C ΔE 0.049
Use #66747B 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.