#66717D
Closest named color: Battleship Gray (#6C757D). oklch(54.4% 0.023 250.6), rgb(102, 113, 125).
Aa
White text reads best on this color (4.97:1).
About this color
#66717D is a medium-dark close to neutral grey. In OKLCH its lightness is 54%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Battleship Gray (#6C757D), ΔE 0.016 away. White text reads best on it, at 4.97:1.
| Hue family | Neutrals |
| Lightness | medium-dark (54%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #66717D |
| RGB | rgb(102, 113, 125) |
| HSL | hsl(211, 10%, 45%) |
| OKLCH | oklch(54.4% 0.023 250.6) |
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 #66717D | 4.97:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #66717D | 4.22:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #66717D text on white | 4.97:1 | AA | Lc 74.4 | Content text, not long reading |
| #66717D text on black | 4.22:1 | AA large text | Lc -27.3 | 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 600.
-
Step 50
50
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6D9DD
oklch(88.4% 0.006 255.5)
-
Step 300
300
#BCC1C7
oklch(80.9% 0.01 252.8)
-
Step 400
400
#99A2AB
oklch(70.8% 0.017 248.1)
-
Step 500
500
#808B96
oklch(63.1% 0.021 248.2)
-
Step 600
600 (this color)
#66717D
oklch(54.4% 0.023 250.6)
-
Step 700
700
#58626D
oklch(49.2% 0.022 250.8)
-
Step 800
800
#485059
oklch(42.7% 0.018 251.4)
-
Step 900
900
#3C4249
oklch(37.6% 0.014 252.3)
-
Step 950
950
#23272B
oklch(27% 0.009 248.2)
#66717D 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) | #6D717E | 0.010 |
| Deuteranopia (no green cones) | #6A6F7D | 0.008 |
| Tritanopia (no blue cones) | #607475 | 0.020 |
| Achromatopsia (no color) | #707070 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66717D
#66717D
oklch(54.4% 0.023 250.6)
- #796E61
#796E61
oklch(54.5% 0.024 71.9)
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 #66717D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.016
- Dim Gray #696969 ΔE 0.032
- Battleship Grey #6B7C85 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.037
- Grey Blue #647D8E ΔE 0.037
- Slate Gray #708090 ΔE 0.050
- Slate #516572 ΔE 0.050
- Steel Grey #6F828A ΔE 0.052
Use #66717D 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.