#3D515F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.4% 0.034 239.1), rgb(61, 81, 95).
Aa
White text reads best on this color (8.26:1).
About this color
#3D515F is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.034 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #3D515F |
| RGB | rgb(61, 81, 95) |
| HSL | hsl(205, 22%, 31%) |
| OKLCH | oklch(42.4% 0.034 239.1) |
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 #3D515F | 8.26:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #3D515F | 2.54:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #3D515F text on white | 8.26:1 | AAA | Lc 88.5 | Fine for body text |
| #3D515F text on black | 2.54:1 | Fails | Lc -13.6 | 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
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B5C3CC
oklch(80.9% 0.02 235.8)
-
Step 400
400
#8FA4B3
oklch(70.7% 0.032 239)
-
Step 500
500
#738DA0
oklch(63% 0.041 240)
-
Step 600
600
#5C778B
oklch(55.6% 0.044 240.6)
-
Step 700
700
#4B6476
oklch(49% 0.042 240)
-
Step 800
800 (this color)
#3D515F
oklch(42.4% 0.034 239.1)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#3D515F 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) | #4B5160 | 0.020 |
| Deuteranopia (no green cones) | #464D5F | 0.017 |
| Tritanopia (no blue cones) | #325555 | 0.028 |
| Achromatopsia (no color) | #4E4E4E | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D515F
#3D515F
oklch(42.4% 0.034 239.1)
- #5D4A3C
#5D4A3C
oklch(42.5% 0.034 58)
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 #3D515F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- YInMn Blue #415A77 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.046
- Deep Teal #00555A ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Dusty Grape #545775 ΔE 0.053
- Petrol #005F6A ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.060
Use #3D515F 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.