#424D63
Closest named color: Dark Grey Blue (#29465B). oklch(42% 0.04 264), rgb(66, 77, 99).
Aa
White text reads best on this color (8.49:1).
About this color
#424D63 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.040 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.044 away. White text reads best on it, at 8.49:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #424D63 |
| RGB | rgb(66, 77, 99) |
| HSL | hsl(220, 20%, 32%) |
| OKLCH | oklch(42% 0.04 264) |
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 #424D63 | 8.49:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #424D63 | 2.47:1 | Fails | Lc 14.8 | Not readable |
| #424D63 text on white | 8.49:1 | AAA | Lc 89.2 | Fine for body text |
| #424D63 text on black | 2.47:1 | Fails | Lc -13.0 | 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
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#B9C1D0
oklch(80.9% 0.023 263.2)
-
Step 400
400
#95A1B8
oklch(70.7% 0.036 263.5)
-
Step 500
500
#7B8AA7
oklch(63.2% 0.047 263.5)
-
Step 600
600
#647392
oklch(55.5% 0.052 264.6)
-
Step 700
700
#53617C
oklch(49.2% 0.047 263.3)
-
Step 800
800 (this color)
#424D63
oklch(42% 0.04 264)
-
Step 900
900
#394252
oklch(37.8% 0.03 261.9)
-
Step 950
950
#222630
oklch(26.9% 0.02 267.9)
#424D63 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) | #464E64 | 0.007 |
| Deuteranopia (no green cones) | #434B62 | 0.006 |
| Tritanopia (no blue cones) | #395154 | 0.035 |
| Achromatopsia (no color) | #4D4D4D | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424D63
#424D63
oklch(42% 0.04 264)
- #574B34
#574B34
oklch(41.9% 0.039 83.3)
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 #424D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.044
- YInMn Blue #415A77 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dusty Grape #545775 ΔE 0.049
- Charcoal #264653 ΔE 0.052
- Dusk #4E5481 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.060
- Deep Teal #00555A ΔE 0.063
Use #424D63 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.