#3B4E55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.1% 0.026 222.4), rgb(59, 78, 85).
Aa
White text reads best on this color (8.72:1).
About this color
#3B4E55 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.72:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #3B4E55 |
| RGB | rgb(59, 78, 85) |
| HSL | hsl(196, 18%, 28%) |
| OKLCH | oklch(41.1% 0.026 222.4) |
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 #3B4E55 | 8.72:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #3B4E55 | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #3B4E55 text on white | 8.72:1 | AAA | Lc 89.9 | Fine for body text |
| #3B4E55 text on black | 2.40:1 | Fails | Lc -12.4 | 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
#D3DADD
oklch(88.4% 0.009 225.1)
-
Step 300
300
#B6C3C8
oklch(80.9% 0.016 222.7)
-
Step 400
400
#91A4AC
oklch(70.6% 0.024 225)
-
Step 500
500
#758E97
oklch(63% 0.032 221.7)
-
Step 600
600
#5E7882
oklch(55.6% 0.034 223.4)
-
Step 700
700
#4D656E
oklch(49.1% 0.032 222.9)
-
Step 800
800 (this color)
#3B4E55
oklch(41.1% 0.026 222.4)
-
Step 900
900
#36444A
oklch(37.7% 0.021 225.8)
-
Step 950
950
#20282B
oklch(27% 0.013 222.5)
#3B4E55 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) | #4A4D55 | 0.022 |
| Deuteranopia (no green cones) | #464A55 | 0.019 |
| Tritanopia (no blue cones) | #335050 | 0.016 |
| Achromatopsia (no color) | #4B4B4B | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4E55
#3B4E55
oklch(41.1% 0.026 222.4)
- #57463F
#57463F
oklch(41% 0.026 43.6)
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 #3B4E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Charcoal #264653 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.044
- Deep Teal #00555A ΔE 0.046
- Dark Teal #014D4E ΔE 0.052
- Dark Blue Green #005249 ΔE 0.056
- YInMn Blue #415A77 ΔE 0.061
Use #3B4E55 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.