#424B6D
Closest named color: Dusk (#4E5481). oklch(42% 0.058 272.3), rgb(66, 75, 109).
Aa
White text reads best on this color (8.54:1).
About this color
#424B6D is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.058 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.044 away. White text reads best on it, at 8.54:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #424B6D |
| RGB | rgb(66, 75, 109) |
| HSL | hsl(227, 25%, 34%) |
| OKLCH | oklch(42% 0.058 272.3) |
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 #424B6D | 8.54:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #424B6D | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #424B6D text on white | 8.54:1 | AAA | Lc 89.3 | Fine for body text |
| #424B6D text on black | 2.45:1 | Fails | Lc -12.9 | 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
#D5D9E6
oklch(88.6% 0.018 272.3)
-
Step 300
300
#B9C0D7
oklch(81% 0.033 272.2)
-
Step 400
400
#959FC3
oklch(70.7% 0.054 272.8)
-
Step 500
500
#7B87B4
oklch(63.1% 0.069 272.7)
-
Step 600
600
#6471A0
oklch(55.7% 0.075 271.9)
-
Step 700
700
#535E89
oklch(49.1% 0.07 272.6)
-
Step 800
800 (this color)
#424B6D
oklch(42% 0.058 272.3)
-
Step 900
900
#39405A
oklch(37.7% 0.046 272.4)
-
Step 950
950
#212635
oklch(27.1% 0.029 270.1)
#424B6D 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) | #404E6E | 0.009 |
| Deuteranopia (no green cones) | #3C4B6C | 0.009 |
| Tritanopia (no blue cones) | #355257 | 0.053 |
| Achromatopsia (no color) | #4C4C4C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B6D
#424B6D
oklch(42% 0.058 272.3)
- #584C26
#584C26
oklch(41.9% 0.058 92.3)
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 #424B6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.045
- Dusty Grape #545775 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
- Twilight #4E518B ΔE 0.054
- Light Navy #155084 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.057
- Dusk Blue #26538D ΔE 0.059
Use #424B6D 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.