#424D5E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.7% 0.032 259), rgb(66, 77, 94).
Aa
White text reads best on this color (8.55:1).
About this color
#424D5E is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.032 and its hue 259°. 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 8.55:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #424D5E |
| RGB | rgb(66, 77, 94) |
| HSL | hsl(216, 18%, 31%) |
| OKLCH | oklch(41.7% 0.032 259) |
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 #424D5E | 8.55:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #424D5E | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #424D5E text on white | 8.55:1 | AAA | Lc 89.4 | Fine for body text |
| #424D5E 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
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#96A1B4
oklch(70.6% 0.03 261.4)
-
Step 500
500
#7C8AA1
oklch(63% 0.038 260.3)
-
Step 600
600
#65748C
oklch(55.6% 0.042 259.8)
-
Step 700
700
#546277
oklch(49.2% 0.038 258.4)
-
Step 800
800 (this color)
#424D5E
oklch(41.7% 0.032 259)
-
Step 900
900
#3A424F
oklch(37.7% 0.025 260.1)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#424D5E 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) | #474E5F | 0.009 |
| Deuteranopia (no green cones) | #444B5E | 0.007 |
| Tritanopia (no blue cones) | #3A5153 | 0.028 |
| Achromatopsia (no color) | #4C4C4C | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424D5E
#424D5E
oklch(41.7% 0.032 259)
- #564B39
#564B39
oklch(41.9% 0.032 79.9)
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 #424D5E, 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 0.043
- Charcoal #264653 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.049
- Dusty Grape #545775 ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.054
- Deep Teal #00555A ΔE 0.059
- Dusk #4E5481 ΔE 0.062
Use #424D5E 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.