#3D5355
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.5% 0.027 203.2), rgb(61, 83, 85).
Aa
White text reads best on this color (8.18:1).
About this color
#3D5355 is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 8.18:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #3D5355 |
| RGB | rgb(61, 83, 85) |
| HSL | hsl(185, 16%, 29%) |
| OKLCH | oklch(42.5% 0.027 203.2) |
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 #3D5355 | 8.18:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #3D5355 | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #3D5355 text on white | 8.18:1 | AAA | Lc 88.3 | Fine for body text |
| #3D5355 text on black | 2.56:1 | Fails | Lc -13.9 | 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
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B5C4C5
oklch(80.9% 0.017 201.7)
-
Step 400
400
#8FA6A8
oklch(70.8% 0.026 203)
-
Step 500
500
#739092
oklch(63.2% 0.033 201.6)
-
Step 600
600
#5B7A7C
oklch(55.6% 0.036 201.1)
-
Step 700
700
#4B6669
oklch(49% 0.032 204.7)
-
Step 800
800 (this color)
#3D5355
oklch(42.5% 0.027 203.2)
-
Step 900
900
#354547
oklch(37.7% 0.021 205.7)
-
Step 950
950
#1F2829
oklch(26.9% 0.013 204.7)
#3D5355 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) | #505155 | 0.028 |
| Deuteranopia (no green cones) | #4B4E55 | 0.024 |
| Tritanopia (no blue cones) | #355554 | 0.012 |
| Achromatopsia (no color) | #4F4F4F | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D5355
#3D5355
oklch(42.5% 0.027 203.2)
- #5D4947
#5D4947
oklch(42.6% 0.028 24.9)
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 #3D5355, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Deep Teal #00555A ΔE 0.045
- Petrol #005F6A ΔE 0.053
- Charcoal #264653 ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Dark Blue Green #005249 ΔE 0.056
- YInMn Blue #415A77 ΔE 0.056
Use #3D5355 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.