#424D73
Closest named color: Dusk (#4E5481). oklch(42.8% 0.065 271.1), rgb(66, 77, 115).
Aa
White text reads best on this color (8.26:1).
About this color
#424D73 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.065 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.035 away. White text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #424D73 |
| RGB | rgb(66, 77, 115) |
| HSL | hsl(227, 27%, 35%) |
| OKLCH | oklch(42.8% 0.065 271.1) |
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 #424D73 | 8.26:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #424D73 | 2.54:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #424D73 text on white | 8.26:1 | AAA | Lc 88.5 | Fine for body text |
| #424D73 text on black | 2.54:1 | Fails | Lc -13.7 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B7C0DA
oklch(80.9% 0.038 270.4)
-
Step 400
400
#929FC7
oklch(70.6% 0.061 270.8)
-
Step 500
500
#7887B9
oklch(63.1% 0.078 271.2)
-
Step 600
600
#6170A5
oklch(55.5% 0.085 271.4)
-
Step 700
700
#505E8D
oklch(49.1% 0.078 270.7)
-
Step 800
800 (this color)
#424D73
oklch(42.8% 0.065 271.1)
-
Step 900
900
#38405D
oklch(37.7% 0.051 271.9)
-
Step 950
950
#212636
oklch(27.1% 0.031 270.8)
#424D73 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) | #405175 | 0.012 |
| Deuteranopia (no green cones) | #3C4D72 | 0.009 |
| Tritanopia (no blue cones) | #32555B | 0.058 |
| Achromatopsia (no color) | #4E4E4E | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424D73
#424D73
oklch(42.8% 0.065 271.1)
- #5C4E22
#5C4E22
oklch(42.8% 0.065 91.8)
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 #424D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.035
- YInMn Blue #415A77 ΔE 0.038
- Dusty Grape #545775 ΔE 0.043
- Twilight #4E518B ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.048
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.055
Use #424D73 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.