#424B6B
Closest named color: YInMn Blue (#415A77). oklch(41.9% 0.055 271.8), rgb(66, 75, 107).
Aa
White text reads best on this color (8.57:1).
About this color
#424B6B is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.055 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.045 away. White text reads best on it, at 8.57:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.45:1 |
| White text | 8.57:1 |
Values
| HEX | #424B6B |
| RGB | rgb(66, 75, 107) |
| HSL | hsl(227, 24%, 34%) |
| OKLCH | oklch(41.9% 0.055 271.8) |
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 #424B6B | 8.57:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #424B6B | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #424B6B text on white | 8.57:1 | AAA | Lc 89.4 | Fine for body text |
| #424B6B text on black | 2.45:1 | Fails | Lc -12.8 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#B9C0D6
oklch(80.9% 0.032 271.6)
-
Step 400
400
#959FC1
oklch(70.6% 0.051 272.2)
-
Step 500
500
#7B87B2
oklch(63% 0.066 272.3)
-
Step 600
600
#64719E
oklch(55.6% 0.072 271.5)
-
Step 700
700
#535E87
oklch(49% 0.067 272.2)
-
Step 800
800 (this color)
#424B6B
oklch(41.9% 0.055 271.8)
-
Step 900
900
#394059
oklch(37.6% 0.044 272.1)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#424B6B 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) | #414E6C | 0.009 |
| Deuteranopia (no green cones) | #3D4B6A | 0.008 |
| Tritanopia (no blue cones) | #365156 | 0.049 |
| Achromatopsia (no color) | #4C4C4C | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B6B
#424B6B
oklch(41.9% 0.055 271.8)
- #584C28
#584C28
oklch(42% 0.055 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 #424B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.045
- Dusk #4E5481 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Dusty Grape #545775 ΔE 0.048
- Twilight #4E518B ΔE 0.057
- Light Navy #155084 ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Charcoal #264653 ΔE 0.059
Use #424B6B 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.