#3D4E58
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.3% 0.027 234.1), rgb(61, 78, 88).
Aa
White text reads best on this color (8.64:1).
About this color
#3D4E58 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.64:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #3D4E58 |
| RGB | rgb(61, 78, 88) |
| HSL | hsl(202, 18%, 29%) |
| OKLCH | oklch(41.3% 0.027 234.1) |
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 #3D4E58 | 8.64:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #3D4E58 | 2.42:1 | Fails | Lc 14.3 | Not readable |
| #3D4E58 text on white | 8.64:1 | AAA | Lc 89.7 | Fine for body text |
| #3D4E58 text on black | 2.42:1 | Fails | Lc -12.6 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADE
oklch(88.5% 0.009 236.6)
-
Step 300
300
#B7C3C9
oklch(81% 0.016 229)
-
Step 400
400
#92A4AE
oklch(70.8% 0.025 232)
-
Step 500
500
#778D9A
oklch(63.1% 0.032 233.9)
-
Step 600
600
#5F7785
oklch(55.5% 0.036 233.9)
-
Step 700
700
#4F6471
oklch(49.1% 0.033 235.5)
-
Step 800
800 (this color)
#3D4E58
oklch(41.3% 0.027 234.1)
-
Step 900
900
#37444B
oklch(37.8% 0.021 231.5)
-
Step 950
950
#20282C
oklch(27.1% 0.014 229.5)
#3D4E58 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) | #494D59 | 0.018 |
| Deuteranopia (no green cones) | #464A58 | 0.017 |
| Tritanopia (no blue cones) | #355151 | 0.021 |
| Achromatopsia (no color) | #4C4C4C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4E58
#3D4E58
oklch(41.3% 0.027 234.1)
- #57483E
#57483E
oklch(41.4% 0.026 55.6)
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 #3D4E58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.040
- Charcoal #264653 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.047
- Deep Teal #00555A ΔE 0.049
- Dark Teal #014D4E ΔE 0.056
- YInMn Blue #415A77 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.061
Use #3D4E58 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.