#4C666A
Closest named color: Slate (#516572). oklch(49.1% 0.031 207.9), rgb(76, 102, 106).
Aa
White text reads best on this color (6.14:1).
About this color
#4C666A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.031 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.016 away. White text reads best on it, at 6.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #4C666A |
| RGB | rgb(76, 102, 106) |
| HSL | hsl(188, 16%, 36%) |
| OKLCH | oklch(49.1% 0.031 207.9) |
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 #4C666A | 6.14:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #4C666A | 3.41:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #4C666A text on white | 6.14:1 | AA | Lc 80.7 | Fine for body text |
| #4C666A text on black | 3.41:1 | AA large text | Lc -21.2 | 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 700.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B6C4C6
oklch(81% 0.016 207.1)
-
Step 400
400
#90A5A8
oklch(70.7% 0.024 207.1)
-
Step 500
500
#748F93
oklch(63.1% 0.031 207.4)
-
Step 600
600
#5C797E
oklch(55.5% 0.034 209.2)
-
Step 700
700 (this color)
#4C666A
oklch(49.1% 0.031 207.9)
-
Step 800
800
#3E5356
oklch(42.6% 0.026 207.1)
-
Step 900
900
#354547
oklch(37.7% 0.021 205.7)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#4C666A 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) | #62646A | 0.031 |
| Deuteranopia (no green cones) | #5C606A | 0.027 |
| Tritanopia (no blue cones) | #426867 | 0.015 |
| Achromatopsia (no color) | #616161 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C666A
#4C666A
oklch(49.1% 0.031 207.9)
- #725A57
#725A57
oklch(49.1% 0.032 26.6)
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 #4C666A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.016
- Dim Gray #696969 ΔE 0.043
- YInMn Blue #415A77 ΔE 0.051
- Dark Aqua #05696B ΔE 0.052
- Dusty Grape #545775 ΔE 0.055
- Deep Turquoise #017374 ΔE 0.057
- Dark Aquamarine #017371 ΔE 0.057
- Dark Green Blue #1F6357 ΔE 0.059
Use #4C666A 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.