#3F5146
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.6% 0.029 158), rgb(63, 81, 70).
Aa
White text reads best on this color (8.47:1).
About this color
#3F5146 is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.029. 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 8.47:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.47:1 |
| White text | 8.47:1 |
Values
| HEX | #3F5146 |
| RGB | rgb(63, 81, 70) |
| HSL | hsl(143, 12%, 28%) |
| OKLCH | oklch(41.6% 0.029 158) |
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 #3F5146 | 8.47:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #3F5146 | 2.47:1 | Fails | Lc 14.8 | Not readable |
| #3F5146 text on white | 8.47:1 | AAA | Lc 89.2 | Fine for body text |
| #3F5146 text on black | 2.47:1 | Fails | Lc -13.0 | 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
#D4DBD7
oklch(88.5% 0.009 161.3)
-
Step 300
300
#B8C4BC
oklch(80.9% 0.017 156.8)
-
Step 400
400
#93A69A
oklch(70.7% 0.027 157.9)
-
Step 500
500
#799082
oklch(63.1% 0.034 158.6)
-
Step 600
600
#617A6B
oklch(55.5% 0.037 158.6)
-
Step 700
700
#506759
oklch(49.1% 0.035 158.1)
-
Step 800
800 (this color)
#3F5146
oklch(41.6% 0.029 158)
-
Step 900
900
#38453D
oklch(37.6% 0.022 158.2)
-
Step 950
950
#212924
oklch(27.1% 0.015 157.9)
#3F5146 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) | #514E45 | 0.028 |
| Deuteranopia (no green cones) | #4D4C47 | 0.026 |
| Tritanopia (no blue cones) | #3C514E | 0.013 |
| Achromatopsia (no color) | #4D4D4D | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5146
#3F5146
oklch(41.6% 0.029 158)
- #574651
#574651
oklch(41.6% 0.029 339.5)
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 #3F5146, 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
- Dark Blue Green #005249 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.052
- Deep Teal #00555A ΔE 0.053
- Dark Teal #014D4E ΔE 0.057
- Dark Green Blue #1F6357 ΔE 0.058
- Charcoal #264653 ΔE 0.059
- Pine #2B5D34 ΔE 0.060
Use #3F5146 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.