#424E73
Closest named color: Dusk (#4E5481). oklch(43% 0.064 269.9), rgb(66, 78, 115).
Aa
White text reads best on this color (8.17:1).
About this color
#424E73 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.064 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.033 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #424E73 |
| RGB | rgb(66, 78, 115) |
| HSL | hsl(225, 27%, 35%) |
| OKLCH | oklch(43% 0.064 269.9) |
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 #424E73 | 8.17:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #424E73 | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #424E73 text on white | 8.17:1 | AAA | Lc 88.2 | Fine for body text |
| #424E73 text on black | 2.56:1 | Fails | Lc -13.9 | 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
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B7C0D9
oklch(80.9% 0.037 269.8)
-
Step 400
400
#929FC6
oklch(70.6% 0.059 270.4)
-
Step 500
500
#7788B8
oklch(63.2% 0.075 269.1)
-
Step 600
600
#6071A4
oklch(55.6% 0.082 269.5)
-
Step 700
700
#505E8D
oklch(49.1% 0.078 270.7)
-
Step 800
800 (this color)
#424E73
oklch(43% 0.064 269.9)
-
Step 900
900
#37405C
oklch(37.6% 0.05 270.2)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#424E73 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) | #415175 | 0.009 |
| Deuteranopia (no green cones) | #3D4D72 | 0.008 |
| Tritanopia (no blue cones) | #32565B | 0.058 |
| Achromatopsia (no color) | #4F4F4F | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E73
#424E73
oklch(43% 0.064 269.9)
- #5D4E24
#5D4E24
oklch(42.9% 0.063 90)
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 #424E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.035
- Dusty Grape #545775 ΔE 0.040
- Twilight #4E518B ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.054
Use #424E73 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.