#424C9F
Closest named color: Blueberry (#464196). oklch(45.4% 0.133 274.6), rgb(66, 76, 159).
Aa
White text reads best on this color (7.59:1).
About this color
#424C9F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.133 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 7.59:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.76:1 |
| White text | 7.59:1 |
Values
| HEX | #424C9F |
| RGB | rgb(66, 76, 159) |
| HSL | hsl(234, 41%, 44%) |
| OKLCH | oklch(45.4% 0.133 274.6) |
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 #424C9F | 7.59:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #424C9F | 2.76:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #424C9F text on white | 7.59:1 | AAA | Lc 86.1 | Fine for body text |
| #424C9F text on black | 2.76:1 | Fails | Lc -15.9 | Dividers and decoration only |
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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F7
oklch(88.6% 0.044 274)
-
Step 300
300
#B1BDF4
oklch(80.8% 0.079 274.9)
-
Step 400
400
#8A9AEE
oklch(70.8% 0.124 274.6)
-
Step 500
500
#6E7EE8
oklch(63.1% 0.159 274.5)
-
Step 600
600
#5864D7
oklch(55.5% 0.175 274.7)
-
Step 700
700
#4953BA
oklch(49.2% 0.161 274.7)
-
Step 800
800 (this color)
#424C9F
oklch(45.4% 0.133 274.6)
-
Step 900
900
#323A78
oklch(37.6% 0.105 274.7)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#424C9F 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) | #1F58A2 | 0.043 |
| Deuteranopia (no green cones) | #0A509D | 0.048 |
| Tritanopia (no blue cones) | #035F6E | 0.118 |
| Achromatopsia (no color) | #545454 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424C9F
#424C9F
oklch(45.4% 0.133 274.6)
- #675500
#675500
oklch(45.4% 0.093 94.7)
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 #424C9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Twilight #4E518B ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.048
- Dusk Blue #26538D ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.050
- Cobalt #1E488F ΔE 0.052
- Dusky Blue #475F94 ΔE 0.060
- Dusk #4E5481 ΔE 0.061
Use #424C9F 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.