#424D5D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.7% 0.03 257.7), rgb(66, 77, 93).
Aa
White text reads best on this color (8.56:1).
About this color
#424D5D is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.030 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.038 away. White text reads best on it, at 8.56:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #424D5D |
| RGB | rgb(66, 77, 93) |
| HSL | hsl(216, 17%, 31%) |
| OKLCH | oklch(41.7% 0.03 257.7) |
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 #424D5D | 8.56:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #424D5D | 2.45:1 | Fails | Lc 14.5 | Not readable |
| #424D5D text on white | 8.56:1 | AAA | Lc 89.5 | Fine for body text |
| #424D5D text on black | 2.45:1 | Fails | Lc -12.8 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CC
oklch(80.9% 0.017 259.4)
-
Step 400
400
#96A2B3
oklch(70.8% 0.028 257)
-
Step 500
500
#7C8BA0
oklch(63.2% 0.036 256.8)
-
Step 600
600
#65748B
oklch(55.5% 0.04 258.8)
-
Step 700
700
#546276
oklch(49.2% 0.037 257.3)
-
Step 800
800 (this color)
#424D5D
oklch(41.7% 0.03 257.7)
-
Step 900
900
#3A424E
oklch(37.7% 0.023 258.4)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#424D5D 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) | #484E5E | 0.010 |
| Deuteranopia (no green cones) | #454B5D | 0.007 |
| Tritanopia (no blue cones) | #3B5052 | 0.026 |
| Achromatopsia (no color) | #4C4C4C | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424D5D
#424D5D
oklch(41.7% 0.03 257.7)
- #564A3A
#564A3A
oklch(41.7% 0.03 74.8)
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 #424D5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.043
- Charcoal #264653 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.053
- Dusty Grape #545775 ΔE 0.055
- Deep Teal #00555A ΔE 0.059
- Dusk #4E5481 ΔE 0.064
Use #424D5D 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.