#66768F
Closest named color: Grey Blue (#647D8E). oklch(56.2% 0.043 259.2), rgb(102, 118, 143).
Aa
White text reads best on this color (4.61:1).
About this color
#66768F is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.043 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.021 away. White text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.55:1 |
| White text | 4.61:1 |
Values
| HEX | #66768F |
| RGB | rgb(102, 118, 143) |
| HSL | hsl(217, 17%, 48%) |
| OKLCH | oklch(56.2% 0.043 259.2) |
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 #66768F | 4.61:1 | AA | Lc -77.5 | Fine for body text |
| Black text on #66768F | 4.55:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #66768F text on white | 4.61:1 | AA | Lc 72.0 | Content text, not long reading |
| #66768F text on black | 4.55:1 | AA | Lc -29.6 | 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
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CE
oklch(80.9% 0.02 260.2)
-
Step 400
400
#95A1B5
oklch(70.6% 0.032 260.7)
-
Step 500
500
#7B8AA2
oklch(63% 0.04 259.8)
-
Step 600
600 (this color)
#66768F
oklch(56.2% 0.043 259.2)
-
Step 700
700
#536178
oklch(49% 0.041 260.3)
-
Step 800
800
#445062
oklch(42.8% 0.034 258.4)
-
Step 900
900
#394250
oklch(37.7% 0.027 259.2)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#66768F 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) | #6E7790 | 0.012 |
| Deuteranopia (no green cones) | #69738E | 0.009 |
| Tritanopia (no blue cones) | #5B7B7E | 0.038 |
| Achromatopsia (no color) | #757575 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66768F
#66768F
oklch(56.2% 0.043 259.2)
- #837258
#837258
oklch(56.1% 0.044 78.2)
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 #66768F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.021
- Battleship Gray #6C757D ΔE 0.028
- Battleship Grey #6B7C85 ΔE 0.028
- Stormy Blue #507B9C ΔE 0.031
- Metallic Blue #4F738E ΔE 0.032
- Slate Gray #708090 ΔE 0.034
- Dull Blue #49759C ΔE 0.040
- Cerulean #457B9D ΔE 0.041
Use #66768F 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.