#424F73
Closest named color: Dusk (#4E5481). oklch(43.2% 0.062 268.5), rgb(66, 79, 115).
Aa
White text reads best on this color (8.08:1).
About this color
#424F73 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.062 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.032 away. White text reads best on it, at 8.08:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #424F73 |
| RGB | rgb(66, 79, 115) |
| HSL | hsl(224, 27%, 35%) |
| OKLCH | oklch(43.2% 0.062 268.5) |
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 #424F73 | 8.08:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #424F73 | 2.59:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #424F73 text on white | 8.08:1 | AAA | Lc 88.0 | Fine for body text |
| #424F73 text on black | 2.59:1 | Fails | Lc -14.2 | 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
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B7C0D9
oklch(80.9% 0.037 269.8)
-
Step 400
400
#91A0C6
oklch(70.7% 0.058 268)
-
Step 500
500
#7688B7
oklch(63.1% 0.074 268.1)
-
Step 600
600
#5F71A3
oklch(55.5% 0.081 268.5)
-
Step 700
700
#4F5F8C
oklch(49.2% 0.075 268.6)
-
Step 800
800 (this color)
#424F73
oklch(43.2% 0.062 268.5)
-
Step 900
900
#37415C
oklch(37.8% 0.048 268.4)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#424F73 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) | #435275 | 0.009 |
| Deuteranopia (no green cones) | #3E4E72 | 0.007 |
| Tritanopia (no blue cones) | #32565C | 0.055 |
| Achromatopsia (no color) | #505050 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424F73
#424F73
oklch(43.2% 0.062 268.5)
- #5E4F25
#5E4F25
oklch(43.3% 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 #424F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.032
- YInMn Blue #415A77 ΔE 0.033
- Dusty Grape #545775 ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.044
- Twilight #4E518B ΔE 0.044
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.054
Use #424F73 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.