#424F83
Closest named color: Twilight (#4E518B). oklch(44.1% 0.087 271.8), rgb(66, 79, 131).
Aa
White text reads best on this color (7.84:1).
About this color
#424F83 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.087 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.023 away. White text reads best on it, at 7.84:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #424F83 |
| RGB | rgb(66, 79, 131) |
| HSL | hsl(228, 33%, 39%) |
| OKLCH | oklch(44.1% 0.087 271.8) |
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 #424F83 | 7.84:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #424F83 | 2.67:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #424F83 text on white | 7.84:1 | AAA | Lc 87.1 | Fine for body text |
| #424F83 text on black | 2.67:1 | Fails | Lc -15.0 | 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
#D2D8EC
oklch(88.4% 0.028 272.5)
-
Step 300
300
#B5BFE2
oklch(80.8% 0.051 272.7)
-
Step 400
400
#8E9ED4
oklch(70.7% 0.081 271.5)
-
Step 500
500
#7385C9
oklch(63.1% 0.105 271.8)
-
Step 600
600
#5C6EB5
oklch(55.6% 0.112 271.6)
-
Step 700
700
#4C5B9C
oklch(49% 0.106 272.2)
-
Step 800
800 (this color)
#424F83
oklch(44.1% 0.087 271.8)
-
Step 900
900
#353F66
oklch(37.8% 0.068 271.9)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#424F83 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) | #3B5585 | 0.018 |
| Deuteranopia (no green cones) | #354F82 | 0.017 |
| Tritanopia (no blue cones) | #295A62 | 0.079 |
| Achromatopsia (no color) | #525252 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424F83
#424F83
oklch(44.1% 0.087 271.8)
- #645107
#645107
oklch(44.2% 0.087 92.5)
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 #424F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.023
- Dusk #4E5481 ΔE 0.025
- Dusk Blue #26538D ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.043
- Light Navy #155084 ΔE 0.045
- Dusty Grape #545775 ΔE 0.047
Use #424F83 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.