#3D4D40
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.2% 0.03 150.4), rgb(61, 77, 64).
Aa
White text reads best on this color (8.99:1).
About this color
#3D4D40 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.99:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #3D4D40 |
| RGB | rgb(61, 77, 64) |
| HSL | hsl(131, 12%, 27%) |
| OKLCH | oklch(40.2% 0.03 150.4) |
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 #3D4D40 | 8.99:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #3D4D40 | 2.33:1 | Fails | Lc 13.3 | Not readable |
| #3D4D40 text on white | 8.99:1 | AAA | Lc 90.7 | Preferred for body text |
| #3D4D40 text on black | 2.33:1 | Fails | Lc -11.7 | Not readable |
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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D5DBD6
oklch(88.5% 0.009 150.7)
-
Step 300
300
#B9C4BB
oklch(80.9% 0.017 151)
-
Step 400
400
#95A698
oklch(70.8% 0.028 150.6)
-
Step 500
500
#7B907E
oklch(63.1% 0.036 149.3)
-
Step 600
600
#647A68
oklch(55.6% 0.038 150.3)
-
Step 700
700
#526756
oklch(49.1% 0.037 150.5)
-
Step 800
800 (this color)
#3D4D40
oklch(40.2% 0.03 150.4)
-
Step 900
900
#39453B
oklch(37.6% 0.023 150)
-
Step 950
950
#212923
oklch(27.1% 0.016 152.8)
#3D4D40 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) | #4D4A3F | 0.025 |
| Deuteranopia (no green cones) | #4A4841 | 0.025 |
| Tritanopia (no blue cones) | #3B4C49 | 0.016 |
| Achromatopsia (no color) | #494949 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4D40
#3D4D40
oklch(40.2% 0.03 150.4)
- #524350
#524350
oklch(40.3% 0.029 330.5)
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 #3D4D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Blue Green #005249 ΔE 0.049
- Dark Teal #014D4E ΔE 0.053
- Charcoal #264653 ΔE 0.054
- Deep Teal #00555A ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.062
- Pine #2B5D34 ΔE 0.064
Use #3D4D40 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.