#424E83
Closest named color: Twilight (#4E518B). oklch(43.9% 0.089 272.6), rgb(66, 78, 131).
Aa
White text reads best on this color (7.92:1).
About this color
#424E83 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.089 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.024 away. White text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.64:1 |
| White text | 7.92:1 |
Values
| HEX | #424E83 |
| RGB | rgb(66, 78, 131) |
| HSL | hsl(229, 33%, 39%) |
| OKLCH | oklch(43.9% 0.089 272.6) |
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 #424E83 | 7.92:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #424E83 | 2.64:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #424E83 text on white | 7.92:1 | AAA | Lc 87.4 | Fine for body text |
| #424E83 text on black | 2.64:1 | Fails | Lc -14.7 | 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
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B5BFE3
oklch(80.9% 0.052 273)
-
Step 400
400
#8F9ED5
oklch(70.8% 0.082 272.4)
-
Step 500
500
#7485CA
oklch(63.2% 0.106 272.5)
-
Step 600
600
#5D6DB6
oklch(55.5% 0.115 272.8)
-
Step 700
700
#4D5B9D
oklch(49.1% 0.107 272.9)
-
Step 800
800 (this color)
#424E83
oklch(43.9% 0.089 272.6)
-
Step 900
900
#353F66
oklch(37.8% 0.068 271.9)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#424E83 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) | #3A5485 | 0.019 |
| Deuteranopia (no green cones) | #344F82 | 0.018 |
| Tritanopia (no blue cones) | #295962 | 0.079 |
| Achromatopsia (no color) | #515151 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E83
#424E83
oklch(43.9% 0.089 272.6)
- #635003
#635003
oklch(43.8% 0.088 92.7)
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 #424E83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.024
- Dusk #4E5481 ΔE 0.027
- Dusk Blue #26538D ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.040
- Light Navy #155084 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.045
- Dusty Grape #545775 ΔE 0.049
Use #424E83 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.