#424B5E
Closest named color: Dark Grey Blue (#29465B). oklch(41.3% 0.034 265.1), rgb(66, 75, 94).
Aa
White text reads best on this color (8.75:1).
About this color
#424B5E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.034 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.039 away. White text reads best on it, at 8.75:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #424B5E |
| RGB | rgb(66, 75, 94) |
| HSL | hsl(221, 18%, 31%) |
| OKLCH | oklch(41.3% 0.034 265.1) |
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 #424B5E | 8.75:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #424B5E | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #424B5E text on white | 8.75:1 | AAA | Lc 90.0 | Fine for body text |
| #424B5E text on black | 2.39:1 | Fails | Lc -12.3 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#BAC1CE
oklch(80.9% 0.02 263)
-
Step 400
400
#97A1B5
oklch(70.8% 0.031 264.4)
-
Step 500
500
#7D8AA3
oklch(63.2% 0.041 263.5)
-
Step 600
600
#67738E
oklch(55.6% 0.045 266.2)
-
Step 700
700
#556179
oklch(49.2% 0.041 264.1)
-
Step 800
800 (this color)
#424B5E
oklch(41.3% 0.034 265.1)
-
Step 900
900
#3B4250
oklch(37.8% 0.026 264.2)
-
Step 950
950
#22262F
oklch(26.9% 0.018 266.3)
#424B5E 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) | #454C5F | 0.006 |
| Deuteranopia (no green cones) | #424A5E | 0.003 |
| Tritanopia (no blue cones) | #3A4F51 | 0.032 |
| Achromatopsia (no color) | #4B4B4B | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B5E
#424B5E
oklch(41.3% 0.034 265.1)
- #544A36
#544A36
oklch(41.3% 0.034 84.4)
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 #424B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.042
- Charcoal #264653 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.053
- Dusty Grape #545775 ΔE 0.057
- Deep Teal #00555A ΔE 0.062
- Dusk #4E5481 ΔE 0.063
Use #424B5E 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.