#66808E
Closest named color: Grey Blue (#647D8E). oklch(58.5% 0.037 231.7), rgb(102, 128, 142).
Aa
Black text reads best on this color (5.04:1).
About this color
#66808E is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.037 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.010 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #66808E |
| RGB | rgb(102, 128, 142) |
| HSL | hsl(201, 16%, 48%) |
| OKLCH | oklch(58.5% 0.037 231.7) |
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 #66808E | 4.16:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #66808E | 5.04:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #66808E text on white | 4.16:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #66808E text on black | 5.04:1 | AA | Lc -33.0 | Non-text elements, placeholder text |
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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3CA
oklch(80.9% 0.017 231)
-
Step 400
400
#91A4AE
oklch(70.7% 0.026 230.6)
-
Step 500
500
#758E9B
oklch(63.2% 0.035 230.6)
-
Step 600
600 (this color)
#66808E
oklch(58.5% 0.037 231.7)
-
Step 700
700
#4D6571
oklch(49.2% 0.034 229.9)
-
Step 800
800
#3F525C
oklch(42.7% 0.029 231.2)
-
Step 900
900
#36444B
oklch(37.7% 0.022 229.7)
-
Step 950
950
#20282C
oklch(27.1% 0.014 229.5)
#66808E 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) | #797F8F | 0.026 |
| Deuteranopia (no green cones) | #737A8E | 0.023 |
| Tritanopia (no blue cones) | #5A8484 | 0.027 |
| Achromatopsia (no color) | #7C7C7C | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66808E
#66808E
oklch(58.5% 0.037 231.7)
- #8E7668
#8E7668
oklch(58.5% 0.037 52)
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 #66808E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.010
- Slate Gray #708090 ΔE 0.014
- Battleship Grey #6B7C85 ΔE 0.015
- Steel Grey #6F828A ΔE 0.015
- Steel #738595 ΔE 0.025
- Battleship Gray #6C757D ΔE 0.034
- Light Slate Gray #778899 ΔE 0.036
- Medium Grey #7D7F7C ΔE 0.039
Use #66808E 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.