#3D4B52
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.3% 0.021 229.6), rgb(61, 75, 82).
Aa
White text reads best on this color (9.02:1).
About this color
#3D4B52 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 9.02:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #3D4B52 |
| RGB | rgb(61, 75, 82) |
| HSL | hsl(200, 15%, 28%) |
| OKLCH | oklch(40.3% 0.021 229.6) |
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 #3D4B52 | 9.02:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #3D4B52 | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #3D4B52 text on white | 9.02:1 | AAA | Lc 90.7 | Preferred for body text |
| #3D4B52 text on black | 2.32:1 | Fails | Lc -11.6 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D5DADD
oklch(88.5% 0.007 233.7)
-
Step 300
300
#B9C2C7
oklch(80.9% 0.012 231.7)
-
Step 400
400
#94A3AB
oklch(70.6% 0.021 230.8)
-
Step 500
500
#7A8D96
oklch(63.1% 0.026 228)
-
Step 600
600
#637781
oklch(55.7% 0.028 229.5)
-
Step 700
700
#52646D
oklch(49.2% 0.026 229.6)
-
Step 800
800 (this color)
#3D4B52
oklch(40.3% 0.021 229.6)
-
Step 900
900
#394349
oklch(37.6% 0.017 234.2)
-
Step 950
950
#21282B
oklch(27.1% 0.011 225.5)
#3D4B52 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) | #474A52 | 0.015 |
| Deuteranopia (no green cones) | #444852 | 0.013 |
| Tritanopia (no blue cones) | #374D4D | 0.015 |
| Achromatopsia (no color) | #494949 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4B52
#3D4B52
oklch(40.3% 0.021 229.6)
- #53453E
#53453E
oklch(40.3% 0.022 48.1)
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 #3D4B52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.036
- Charcoal #264653 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.037
- Deep Teal #00555A ΔE 0.052
- Dark Teal #014D4E ΔE 0.053
- Dark Blue Green #005249 ΔE 0.059
- Onyx #343A40 ΔE 0.059
Use #3D4B52 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.