#424879
Closest named color: Dusk (#4E5481). oklch(42% 0.082 277), rgb(66, 72, 121).
Aa
White text reads best on this color (8.62:1).
About this color
#424879 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.082 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.042 away. White text reads best on it, at 8.62:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.43:1 |
| White text | 8.62:1 |
Values
| HEX | #424879 |
| RGB | rgb(66, 72, 121) |
| HSL | hsl(233, 29%, 37%) |
| OKLCH | oklch(42% 0.082 277) |
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 #424879 | 8.62:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #424879 | 2.43:1 | Fails | Lc 14.4 | Not readable |
| #424879 text on white | 8.62:1 | AAA | Lc 89.5 | Fine for body text |
| #424879 text on black | 2.43:1 | Fails | Lc -12.7 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B8BEE0
oklch(80.8% 0.048 277.4)
-
Step 400
400
#949DD0
oklch(70.8% 0.075 276.5)
-
Step 500
500
#7A84C4
oklch(63.1% 0.097 276.5)
-
Step 600
600
#646CB1
oklch(55.5% 0.107 277.3)
-
Step 700
700
#535A98
oklch(49.1% 0.099 277.2)
-
Step 800
800 (this color)
#424879
oklch(42% 0.082 277)
-
Step 900
900
#393E63
oklch(37.7% 0.064 277)
-
Step 950
950
#21253A
oklch(27.1% 0.04 275.2)
#424879 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) | #364E7B | 0.022 |
| Deuteranopia (no green cones) | #324A78 | 0.022 |
| Tritanopia (no blue cones) | #30525A | 0.073 |
| Achromatopsia (no color) | #4C4C4C | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424879
#424879
oklch(42% 0.082 277)
- #5A4D0A
#5A4D0A
oklch(42.1% 0.082 97.1)
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 #424879, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.042
- Twilight #4E518B ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.046
- Dusk Blue #26538D ΔE 0.048
- Light Navy #155084 ΔE 0.049
- Cobalt #1E488F ΔE 0.054
- Blueberry #464196 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.055
Use #424879 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.