#424F79
Closest named color: Dusk (#4E5481). oklch(43.6% 0.072 270.1), rgb(66, 79, 121).
Aa
White text reads best on this color (7.99:1).
About this color
#424F79 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.072 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.027 away. White text reads best on it, at 7.99:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #424F79 |
| RGB | rgb(66, 79, 121) |
| HSL | hsl(226, 29%, 37%) |
| OKLCH | oklch(43.6% 0.072 270.1) |
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 #424F79 | 7.99:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #424F79 | 2.62:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #424F79 text on white | 7.99:1 | AAA | Lc 87.7 | Fine for body text |
| #424F79 text on black | 2.62:1 | Fails | Lc -14.5 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E9
oklch(88.6% 0.023 269.4)
-
Step 300
300
#B6C0DD
oklch(80.9% 0.042 270.4)
-
Step 400
400
#909FCB
oklch(70.7% 0.067 270)
-
Step 500
500
#7587BE
oklch(63.1% 0.086 269.9)
-
Step 600
600
#5E70AA
oklch(55.6% 0.093 270.1)
-
Step 700
700
#4E5E92
oklch(49.2% 0.086 270)
-
Step 800
800 (this color)
#424F79
oklch(43.6% 0.072 270.1)
-
Step 900
900
#36405F
oklch(37.7% 0.055 269.9)
-
Step 950
950
#202638
oklch(27.1% 0.035 269.8)
#424F79 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) | #40537B | 0.012 |
| Deuteranopia (no green cones) | #3B4E78 | 0.011 |
| Tritanopia (no blue cones) | #2F585E | 0.065 |
| Achromatopsia (no color) | #515151 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424F79
#424F79
oklch(43.6% 0.072 270.1)
- #614F1D
#614F1D
oklch(43.5% 0.071 89.2)
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 #424F79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.027
- YInMn Blue #415A77 ΔE 0.035
- Twilight #4E518B ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.039
- Dusty Grape #545775 ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- Light Navy #155084 ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.048
Use #424F79 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.