#40686D
Closest named color: Slate (#516572). oklch(49% 0.046 205.8), rgb(64, 104, 109).
Aa
White text reads best on this color (6.14:1).
About this color
#40686D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.046 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 6.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #40686D |
| RGB | rgb(64, 104, 109) |
| HSL | hsl(187, 26%, 34%) |
| OKLCH | oklch(49% 0.046 205.8) |
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 #40686D | 6.14:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #40686D | 3.41:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #40686D text on white | 6.14:1 | AA | Lc 80.6 | Fine for body text |
| #40686D text on black | 3.41:1 | AA large text | Lc -21.3 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#88A7AB
oklch(70.6% 0.035 206)
-
Step 500
500
#699297
oklch(63.2% 0.046 205.5)
-
Step 600
600
#507C81
oklch(55.6% 0.049 204.9)
-
Step 700
700 (this color)
#40686D
oklch(49% 0.046 205.8)
-
Step 800
800
#355559
oklch(42.6% 0.038 205.8)
-
Step 900
900
#2F4649
oklch(37.6% 0.029 206.2)
-
Step 950
950
#1C292B
oklch(27% 0.018 207.9)
#40686D 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) | #62656D | 0.045 |
| Deuteranopia (no green cones) | #5A5F6D | 0.041 |
| Tritanopia (no blue cones) | #2D6B69 | 0.022 |
| Achromatopsia (no color) | #626262 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40686D
#40686D
oklch(49% 0.046 205.8)
- #785753
#785753
oklch(49% 0.045 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 #40686D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Dark Aqua #05696B ΔE 0.039
- Deep Turquoise #017374 ΔE 0.044
- Dark Aquamarine #017371 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.051
- Deep Aqua #08787F ΔE 0.053
- Petrol #005F6A ΔE 0.055
Use #40686D 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.