#424A64
Closest named color: Dark Grey Blue (#29465B). oklch(41.3% 0.045 271.1), rgb(66, 74, 100).
Aa
White text reads best on this color (8.76:1).
About this color
#424A64 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.045 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.041 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #424A64 |
| RGB | rgb(66, 74, 100) |
| HSL | hsl(226, 20%, 33%) |
| OKLCH | oklch(41.3% 0.045 271.1) |
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 #424A64 | 8.76:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #424A64 | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #424A64 text on white | 8.76:1 | AAA | Lc 90.0 | Preferred for body text |
| #424A64 text on black | 2.39:1 | Fails | Lc -12.3 | 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
#97A0BC
oklch(70.8% 0.042 271.2)
-
Step 500
500
#7D88AB
oklch(63.1% 0.054 271.2)
-
Step 600
600
#667296
oklch(55.6% 0.058 270.2)
-
Step 700
700
#555F80
oklch(49% 0.055 271.3)
-
Step 800
800 (this color)
#424A64
oklch(41.3% 0.045 271.1)
-
Step 900
900
#3B4155
oklch(37.8% 0.035 271.6)
-
Step 950
950
#222632
oklch(27% 0.023 270.4)
#424A64 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) | #424C65 | 0.006 |
| Deuteranopia (no green cones) | #3F4963 | 0.006 |
| Tritanopia (no blue cones) | #394F53 | 0.040 |
| Achromatopsia (no color) | #4B4B4B | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424A64
#424A64
oklch(41.3% 0.045 271.1)
- #544A2E
#544A2E
oklch(41.2% 0.045 90.6)
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 #424A64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal #264653 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.052
- Dusty Grape #545775 ΔE 0.054
- Dusk #4E5481 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.059
- Light Navy #155084 ΔE 0.066
Use #424A64 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.