#434878
Closest named color: Dusk (#4E5481). oklch(42% 0.08 277.9), rgb(67, 72, 120).
Aa
White text reads best on this color (8.61:1).
About this color
#434878 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.041 away. White text reads best on it, at 8.61:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.43:1 |
| White text | 8.61:1 |
Values
| HEX | #434878 |
| RGB | rgb(67, 72, 120) |
| HSL | hsl(234, 28%, 37%) |
| OKLCH | oklch(42% 0.08 277.9) |
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 #434878 | 8.61:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #434878 | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #434878 text on white | 8.61:1 | AAA | Lc 89.5 | Fine for body text |
| #434878 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
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#B9BEDF
oklch(80.8% 0.047 278.5)
-
Step 400
400
#959DCF
oklch(70.8% 0.074 277.3)
-
Step 500
500
#7C84C3
oklch(63.2% 0.095 277.8)
-
Step 600
600
#656CAF
oklch(55.5% 0.104 277.9)
-
Step 700
700
#545A97
oklch(49.1% 0.097 277.9)
-
Step 800
800 (this color)
#434878
oklch(42% 0.08 277.9)
-
Step 900
900
#3A3E62
oklch(37.7% 0.062 278.2)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#434878 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) | #374E7A | 0.022 |
| Deuteranopia (no green cones) | #334A77 | 0.022 |
| Tritanopia (no blue cones) | #32525A | 0.071 |
| Achromatopsia (no color) | #4C4C4C | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434878
#434878
oklch(42% 0.08 277.9)
- #594D0E
#594D0E
oklch(42% 0.08 97.7)
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 #434878, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.041
- Twilight #4E518B ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.048
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- Dusty Grape #545775 ΔE 0.056
Use #434878 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.