#424C74
Closest named color: Dusk (#4E5481). oklch(42.6% 0.068 272.5), rgb(66, 76, 116).
Aa
White text reads best on this color (8.34:1).
About this color
#424C74 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.068 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.036 away. White text reads best on it, at 8.34:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.51:1 |
| White text | 8.34:1 |
Values
| HEX | #424C74 |
| RGB | rgb(66, 76, 116) |
| HSL | hsl(228, 27%, 36%) |
| OKLCH | oklch(42.6% 0.068 272.5) |
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 #424C74 | 8.34:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #424C74 | 2.51:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #424C74 text on white | 8.34:1 | AAA | Lc 88.7 | Fine for body text |
| #424C74 text on black | 2.51:1 | Fails | Lc -13.5 | 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
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B8C0DB
oklch(81% 0.039 272.4)
-
Step 400
400
#939FC9
oklch(70.8% 0.063 272.3)
-
Step 500
500
#7986BB
oklch(63% 0.081 273.3)
-
Step 600
600
#6270A7
oklch(55.7% 0.087 272.4)
-
Step 700
700
#515D8F
oklch(49% 0.082 272.8)
-
Step 800
800 (this color)
#424C74
oklch(42.6% 0.068 272.5)
-
Step 900
900
#38405E
oklch(37.8% 0.053 272.2)
-
Step 950
950
#212537
oklch(26.9% 0.034 274.3)
#424C74 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) | #3E5076 | 0.012 |
| Deuteranopia (no green cones) | #3A4C73 | 0.011 |
| Tritanopia (no blue cones) | #32545A | 0.061 |
| Achromatopsia (no color) | #4E4E4E | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424C74
#424C74
oklch(42.6% 0.068 272.5)
- #5C4D1E
#5C4D1E
oklch(42.5% 0.068 91.5)
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 #424C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.042
- Twilight #4E518B ΔE 0.044
- Dusty Grape #545775 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.049
- Dusk Blue #26538D ΔE 0.049
- Light Navy #155084 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.055
Use #424C74 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.