#406366
Closest named color: Slate (#516572). oklch(47.4% 0.041 202.7), rgb(64, 99, 102).
Aa
White text reads best on this color (6.57:1).
About this color
#406366 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.041 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 6.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #406366 |
| RGB | rgb(64, 99, 102) |
| HSL | hsl(185, 23%, 33%) |
| OKLCH | oklch(47.4% 0.041 202.7) |
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 #406366 | 6.57:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #406366 | 3.19:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #406366 text on white | 6.57:1 | AA | Lc 82.5 | Fine for body text |
| #406366 text on black | 3.19:1 | AA large text | Lc -19.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B3C5C6
oklch(81% 0.02 200.8)
-
Step 400
400
#8BA7A9
oklch(70.8% 0.031 201.8)
-
Step 500
500
#6D9194
oklch(63.1% 0.04 202.6)
-
Step 600
600
#547B7E
oklch(55.5% 0.044 202)
-
Step 700
700 (this color)
#406366
oklch(47.4% 0.041 202.7)
-
Step 800
800
#395557
oklch(42.8% 0.034 201.6)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#406366 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) | #5E6066 | 0.041 |
| Deuteranopia (no green cones) | #575B66 | 0.037 |
| Tritanopia (no blue cones) | #316664 | 0.018 |
| Achromatopsia (no color) | #5D5D5D | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406366
#406366
oklch(47.4% 0.041 202.7)
- #715351
#715351
oklch(47.3% 0.04 23.1)
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 #406366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Dark Aqua #05696B ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.046
- Petrol #005F6A ΔE 0.047
- Deep Turquoise #017374 ΔE 0.054
- Dark Aquamarine #017371 ΔE 0.054
- Dusty Grape #545775 ΔE 0.057
Use #406366 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.