#40635B
Closest named color: Dark Green Blue (#1F6357). oklch(47% 0.043 178.4), rgb(64, 99, 91).
Aa
White text reads best on this color (6.65:1).
About this color
#40635B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.043 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.032 away. White text reads best on it, at 6.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #40635B |
| RGB | rgb(64, 99, 91) |
| HSL | hsl(166, 21%, 32%) |
| OKLCH | oklch(47% 0.043 178.4) |
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 #40635B | 6.65:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #40635B | 3.15:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #40635B text on white | 6.65:1 | AA | Lc 82.8 | Fine for body text |
| #40635B text on black | 3.15:1 | AA large text | Lc -19.1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DCD9
oklch(88.6% 0.012 176.3)
-
Step 300
300
#B3C5C1
oklch(80.9% 0.02 181)
-
Step 400
400
#8BA8A1
oklch(70.8% 0.034 179)
-
Step 500
500
#6E928A
oklch(63.1% 0.042 179.7)
-
Step 600
600
#567C73
oklch(55.5% 0.045 178.2)
-
Step 700
700 (this color)
#40635B
oklch(47% 0.043 178.4)
-
Step 800
800
#3A564F
oklch(42.9% 0.036 177.2)
-
Step 900
900
#324742
oklch(37.9% 0.028 178.4)
-
Step 950
950
#1D2926
oklch(26.9% 0.017 177.9)
#40635B 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) | #605F5B | 0.045 |
| Deuteranopia (no green cones) | #5A5A5C | 0.044 |
| Tritanopia (no blue cones) | #356461 | 0.013 |
| Achromatopsia (no color) | #5C5C5C | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40635B
#40635B
oklch(47% 0.043 178.4)
- #6F515B
#6F515B
oklch(47% 0.043 357.1)
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 #40635B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.032
- Dark Aqua #05696B ΔE 0.041
- Slate #516572 ΔE 0.045
- Petrol #005F6A ΔE 0.052
- Dark Aquamarine #017371 ΔE 0.056
- Deep Turquoise #017374 ΔE 0.057
- YInMn Blue #415A77 ΔE 0.062
- Dim Gray #696969 ΔE 0.066
Use #40635B 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.