#424A85
Closest named color: Twilight (#4E518B). oklch(43.2% 0.097 275.7), rgb(66, 74, 133).
Aa
White text reads best on this color (8.23:1).
About this color
#424A85 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.097 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.029 away. White text reads best on it, at 8.23:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.54:1 |
| White text | 8.23:1 |
Values
| HEX | #424A85 |
| RGB | rgb(66, 74, 133) |
| HSL | hsl(233, 34%, 39%) |
| OKLCH | oklch(43.2% 0.097 275.7) |
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 #424A85 | 8.23:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #424A85 | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #424A85 text on white | 8.23:1 | AAA | Lc 88.3 | Fine for body text |
| #424A85 text on black | 2.54:1 | Fails | Lc -13.8 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B6BEE6
oklch(80.9% 0.057 276.2)
-
Step 400
400
#919CDA
oklch(70.8% 0.092 276.1)
-
Step 500
500
#7682CF
oklch(63% 0.117 275.8)
-
Step 600
600
#606BBC
oklch(55.7% 0.126 275.7)
-
Step 700
700
#4F59A2
oklch(49.2% 0.117 275.4)
-
Step 800
800 (this color)
#424A85
oklch(43.2% 0.097 275.7)
-
Step 900
900
#373D69
oklch(37.6% 0.075 276.3)
-
Step 950
950
#20243E
oklch(27% 0.049 276)
#424A85 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) | #325287 | 0.028 |
| Deuteranopia (no green cones) | #2C4C84 | 0.028 |
| Tritanopia (no blue cones) | #285661 | 0.085 |
| Achromatopsia (no color) | #4F4F4F | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424A85
#424A85
oklch(43.2% 0.097 275.7)
- #5F4F00
#5F4F00
oklch(43.1% 0.089 95.6)
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 #424A85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.029
- Dusk #4E5481 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.038
- Dusk Blue #26538D ΔE 0.038
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.045
- Light Navy #155084 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
Use #424A85 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.