#40585D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.3% 0.03 211.9), rgb(64, 88, 93).
Aa
White text reads best on this color (7.57:1).
About this color
#40585D is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.030 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.042 away. White text reads best on it, at 7.57:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #40585D |
| RGB | rgb(64, 88, 93) |
| HSL | hsl(190, 18%, 31%) |
| OKLCH | oklch(44.3% 0.03 211.9) |
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 #40585D | 7.57:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #40585D | 2.77:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #40585D text on white | 7.57:1 | AAA | Lc 86.3 | Fine for body text |
| #40585D text on black | 2.77:1 | Fails | Lc -15.8 | 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 800.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDD
oklch(88.5% 0.01 212.5)
-
Step 300
300
#B4C4C7
oklch(80.9% 0.018 210.2)
-
Step 400
400
#8DA6AB
oklch(70.8% 0.029 211.1)
-
Step 500
500
#719096
oklch(63.2% 0.036 210.7)
-
Step 600
600
#597A81
oklch(55.7% 0.039 212.2)
-
Step 700
700
#48676D
oklch(49.2% 0.037 210.9)
-
Step 800
800 (this color)
#40585D
oklch(44.3% 0.03 211.9)
-
Step 900
900
#334549
oklch(37.7% 0.024 212.8)
-
Step 950
950
#1E282B
oklch(26.9% 0.015 218)
#40585D 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) | #54565D | 0.029 |
| Deuteranopia (no green cones) | #4F525D | 0.027 |
| Tritanopia (no blue cones) | #365A59 | 0.016 |
| Achromatopsia (no color) | #545454 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40585D
#40585D
oklch(44.3% 0.03 211.9)
- #634D49
#634D49
oklch(44.2% 0.031 30.2)
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 #40585D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.042
- YInMn Blue #415A77 ΔE 0.043
- Petrol #005F6A ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.049
- Dusty Grape #545775 ΔE 0.052
- Deep Teal #00555A ΔE 0.053
- Slate #516572 ΔE 0.054
- Dark Aqua #05696B ΔE 0.059
Use #40585D 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.