#424B64
Closest named color: Dark Grey Blue (#29465B). oklch(41.5% 0.044 269.1), rgb(66, 75, 100).
Aa
White text reads best on this color (8.67:1).
About this color
#424B64 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.044 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.042 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #424B64 |
| RGB | rgb(66, 75, 100) |
| HSL | hsl(224, 20%, 33%) |
| OKLCH | oklch(41.5% 0.044 269.1) |
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 #424B64 | 8.67:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #424B64 | 2.42:1 | Fails | Lc 14.2 | Not readable |
| #424B64 text on white | 8.67:1 | AAA | Lc 89.7 | Fine for body text |
| #424B64 text on black | 2.42:1 | Fails | Lc -12.5 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E3
oklch(88.5% 0.014 268.5)
-
Step 300
300
#BAC0D2
oklch(80.9% 0.026 271.1)
-
Step 400
400
#96A0BB
oklch(70.7% 0.041 269.3)
-
Step 500
500
#7C89AA
oklch(63.2% 0.052 268.1)
-
Step 600
600
#667295
oklch(55.6% 0.057 269.8)
-
Step 700
700
#54607F
oklch(49.1% 0.052 268.1)
-
Step 800
800 (this color)
#424B64
oklch(41.5% 0.044 269.1)
-
Step 900
900
#3A4154
oklch(37.7% 0.034 269)
-
Step 950
950
#222631
oklch(27% 0.021 269.3)
#424B64 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) | #434D65 | 0.006 |
| Deuteranopia (no green cones) | #404A63 | 0.005 |
| Tritanopia (no blue cones) | #385054 | 0.039 |
| Achromatopsia (no color) | #4B4B4B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B64
#424B64
oklch(41.5% 0.044 269.1)
- #554B30
#554B30
oklch(41.6% 0.043 90)
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 #424B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.042
- YInMn Blue #415A77 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal #264653 ΔE 0.051
- Dusty Grape #545775 ΔE 0.052
- Dusk #4E5481 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.060
- Light Navy #155084 ΔE 0.065
Use #424B64 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.