#424B5C
Closest named color: Dark Grey Blue (#29465B). oklch(41.2% 0.031 263.1), rgb(66, 75, 92).
Aa
White text reads best on this color (8.77:1).
About this color
#424B5C is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.031 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.039 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #424B5C |
| RGB | rgb(66, 75, 92) |
| HSL | hsl(219, 16%, 31%) |
| OKLCH | oklch(41.2% 0.031 263.1) |
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 #424B5C | 8.77:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #424B5C | 2.39:1 | Fails | Lc 13.9 | Not readable |
| #424B5C text on white | 8.77:1 | AAA | Lc 90.1 | Preferred for body text |
| #424B5C text on black | 2.39:1 | Fails | Lc -12.2 | 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
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#97A1B3
oklch(70.7% 0.029 262.3)
-
Step 500
500
#7E8AA0
oklch(63.1% 0.036 262.6)
-
Step 600
600
#67748B
oklch(55.7% 0.039 261.8)
-
Step 700
700
#566176
oklch(49.1% 0.036 263.3)
-
Step 800
800 (this color)
#424B5C
oklch(41.2% 0.031 263.1)
-
Step 900
900
#3B424F
oklch(37.8% 0.024 262.8)
-
Step 950
950
#23272E
oklch(27.2% 0.014 261.7)
#424B5C 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) | #464C5D | 0.007 |
| Deuteranopia (no green cones) | #434A5C | 0.003 |
| Tritanopia (no blue cones) | #3B4E51 | 0.026 |
| Achromatopsia (no color) | #4B4B4B | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B5C
#424B5C
oklch(41.2% 0.031 263.1)
- #534A38
#534A38
oklch(41.3% 0.031 84.4)
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 #424B5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.039
- Charcoal #264653 ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.055
- Dusty Grape #545775 ΔE 0.059
- Deep Teal #00555A ΔE 0.061
- Dusk #4E5481 ΔE 0.066
Use #424B5C 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.