#424E5F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.032 257.1), rgb(66, 78, 95).
Aa
White text reads best on this color (8.44:1).
About this color
#424E5F is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.032 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.040 away. White text reads best on it, at 8.44:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #424E5F |
| RGB | rgb(66, 78, 95) |
| HSL | hsl(215, 18%, 32%) |
| OKLCH | oklch(42% 0.032 257.1) |
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 #424E5F | 8.44:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #424E5F | 2.48:1 | Fails | Lc 14.9 | Not readable |
| #424E5F text on white | 8.44:1 | AAA | Lc 89.1 | Fine for body text |
| #424E5F text on black | 2.48:1 | Fails | Lc -13.1 | 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
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CD
oklch(80.8% 0.019 258.4)
-
Step 400
400
#95A2B4
oklch(70.8% 0.03 256.5)
-
Step 500
500
#7B8BA1
oklch(63.2% 0.038 256.4)
-
Step 600
600
#64758C
oklch(55.7% 0.041 256)
-
Step 700
700
#536277
oklch(49.2% 0.039 256.8)
-
Step 800
800 (this color)
#424E5F
oklch(42% 0.032 257.1)
-
Step 900
900
#39424F
oklch(37.6% 0.025 257.5)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#424E5F 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) | #484F60 | 0.010 |
| Deuteranopia (no green cones) | #454C5F | 0.007 |
| Tritanopia (no blue cones) | #3A5254 | 0.028 |
| Achromatopsia (no color) | #4D4D4D | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E5F
#424E5F
oklch(42% 0.032 257.1)
- #574B39
#574B39
oklch(42% 0.033 77.7)
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 #424E5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.045
- YInMn Blue #415A77 ΔE 0.047
- Charcoal #264653 ΔE 0.051
- Dusty Grape #545775 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.057
- Deep Teal #00555A ΔE 0.059
- Dusk #4E5481 ΔE 0.060
Use #424E5F 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.