#3D4B4E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.2% 0.019 212.1), rgb(61, 75, 78).
Aa
White text reads best on this color (9.07:1).
About this color
#3D4B4E is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 9.07:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #3D4B4E |
| RGB | rgb(61, 75, 78) |
| HSL | hsl(191, 12%, 27%) |
| OKLCH | oklch(40.2% 0.019 212.1) |
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 #3D4B4E | 9.07:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #3D4B4E | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #3D4B4E text on white | 9.07:1 | AAA | Lc 90.9 | Preferred for body text |
| #3D4B4E text on black | 2.31:1 | Fails | Lc -11.5 | 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 900.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEB
oklch(93.5% 0.004 219.5)
-
Step 200
200
#D4DADC
oklch(88.4% 0.007 219.6)
-
Step 300
300
#B7C3C6
oklch(80.9% 0.014 214.4)
-
Step 400
400
#92A5A9
oklch(70.8% 0.022 211.8)
-
Step 500
500
#768E94
oklch(63% 0.029 214.6)
-
Step 600
600
#5F787E
oklch(55.5% 0.031 214)
-
Step 700
700
#4E656A
oklch(49% 0.029 212.4)
-
Step 800
800
#405357
oklch(42.8% 0.024 211.9)
-
Step 900
900 (this color)
#3D4B4E
oklch(40.2% 0.019 212.1)
-
Step 950
950
#20282A
oklch(27% 0.012 214.5)
#3D4B4E 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) | #484A4E | 0.017 |
| Deuteranopia (no green cones) | #45484E | 0.015 |
| Tritanopia (no blue cones) | #384C4C | 0.009 |
| Achromatopsia (no color) | #494949 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4B4E
#3D4B4E
oklch(40.2% 0.019 212.1)
- #524542
#524542
oklch(40.3% 0.019 33.1)
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 #3D4B4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Charcoal Grey #3C4142 ΔE 0.033
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.041
- Dark Teal #014D4E ΔE 0.051
- Deep Teal #00555A ΔE 0.052
- Dark Blue Green #005249 ΔE 0.056
- Onyx #343A40 ΔE 0.058
Use #3D4B4E 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.