#424B63
Closest named color: Dark Grey Blue (#29465B). oklch(41.5% 0.042 268.6), rgb(66, 75, 99).
Aa
White text reads best on this color (8.68:1).
About this color
#424B63 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.042 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.041 away. White text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #424B63 |
| RGB | rgb(66, 75, 99) |
| HSL | hsl(224, 20%, 32%) |
| OKLCH | oklch(41.5% 0.042 268.6) |
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 #424B63 | 8.68:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #424B63 | 2.41:1 | Fails | Lc 14.2 | Not readable |
| #424B63 text on white | 8.68:1 | AAA | Lc 89.8 | Fine for body text |
| #424B63 text on black | 2.41:1 | 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
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#BAC0D1
oklch(80.8% 0.025 270.3)
-
Step 400
400
#96A0BA
oklch(70.7% 0.04 268.7)
-
Step 500
500
#7D89A9
oklch(63.2% 0.05 268.8)
-
Step 600
600
#667294
oklch(55.5% 0.055 269.5)
-
Step 700
700
#55607E
oklch(49.2% 0.05 268.9)
-
Step 800
800 (this color)
#424B63
oklch(41.5% 0.042 268.6)
-
Step 900
900
#3A4153
oklch(37.6% 0.032 268.2)
-
Step 950
950
#222631
oklch(27% 0.021 269.3)
#424B63 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) | #434D64 | 0.006 |
| Deuteranopia (no green cones) | #414A62 | 0.004 |
| Tritanopia (no blue cones) | #395053 | 0.038 |
| Achromatopsia (no color) | #4B4B4B | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B63
#424B63
oklch(41.5% 0.042 268.6)
- #554B31
#554B31
oklch(41.6% 0.042 89.3)
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 #424B63, 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
- Dark Slate Gray #2F4F4F ΔE 0.049
- YInMn Blue #415A77 ΔE 0.049
- Charcoal #264653 ΔE 0.050
- Dusty Grape #545775 ΔE 0.053
- Dusk #4E5481 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.058
- Deep Teal #00555A ΔE 0.066
Use #424B63 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.