#66728A
Closest named color: Battleship Gray (#6C757D). oklch(55.1% 0.04 264.2), rgb(102, 114, 138).
Aa
White text reads best on this color (4.83:1).
About this color
#66728A is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.040 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.026 away. White text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.33:1 |
| White text | 4.83:1 |
Values
| HEX | #66728A |
| RGB | rgb(102, 114, 138) |
| HSL | hsl(220, 15%, 47%) |
| OKLCH | oklch(55.1% 0.04 264.2) |
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 #66728A | 4.83:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #66728A | 4.33:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #66728A text on white | 4.83:1 | AA | Lc 73.6 | Content text, not long reading |
| #66728A text on black | 4.33:1 | AA large text | Lc -28.1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BBC1CD
oklch(81% 0.018 264.5)
-
Step 400
400
#97A1B3
oklch(70.7% 0.029 262.3)
-
Step 500
500
#7E8AA1
oklch(63.2% 0.037 263.5)
-
Step 600
600 (this color)
#66728A
oklch(55.1% 0.04 264.2)
-
Step 700
700
#566176
oklch(49.1% 0.036 263.3)
-
Step 800
800
#464F60
oklch(42.6% 0.031 263.1)
-
Step 900
900
#3B424F
oklch(37.8% 0.024 262.8)
-
Step 950
950
#23262E
oklch(26.9% 0.016 269.1)
#66728A 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) | #6A738B | 0.007 |
| Deuteranopia (no green cones) | #677089 | 0.006 |
| Tritanopia (no blue cones) | #5D777A | 0.036 |
| Achromatopsia (no color) | #727272 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66728A
#66728A
oklch(55.1% 0.04 264.2)
- #7D7057
#7D7057
oklch(55% 0.04 83.6)
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 #66728A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.026
- Metallic Blue #4F738E ΔE 0.029
- Grey Blue #647D8E ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.034
- Stormy Blue #507B9C ΔE 0.039
- Dull Blue #49759C ΔE 0.042
- Slate Gray #708090 ΔE 0.044
- Grey Purple #826D8C ΔE 0.044
Use #66728A 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.