#424F63
Closest named color: YInMn Blue (#415A77). oklch(42.4% 0.037 258.9), rgb(66, 79, 99).
Aa
White text reads best on this color (8.29:1).
About this color
#424F63 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.037 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.041 away. White text reads best on it, at 8.29:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #424F63 |
| RGB | rgb(66, 79, 99) |
| HSL | hsl(216, 20%, 32%) |
| OKLCH | oklch(42.4% 0.037 258.9) |
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 #424F63 | 8.29:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #424F63 | 2.53:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #424F63 text on white | 8.29:1 | AAA | Lc 88.7 | Fine for body text |
| #424F63 text on black | 2.53:1 | Fails | Lc -13.5 | 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
#D4D9E1
oklch(88.4% 0.012 259.8)
-
Step 300
300
#B8C1CF
oklch(80.8% 0.022 259.2)
-
Step 400
400
#94A2B7
oklch(70.8% 0.035 258.4)
-
Step 500
500
#798BA5
oklch(63.2% 0.045 257.5)
-
Step 600
600
#627490
oklch(55.5% 0.049 259.1)
-
Step 700
700
#51627B
oklch(49.2% 0.045 257.9)
-
Step 800
800 (this color)
#424F63
oklch(42.4% 0.037 258.9)
-
Step 900
900
#384251
oklch(37.6% 0.029 258.4)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#424F63 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) | #485064 | 0.010 |
| Deuteranopia (no green cones) | #454D63 | 0.007 |
| Tritanopia (no blue cones) | #385356 | 0.032 |
| Achromatopsia (no color) | #4E4E4E | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424F63
#424F63
oklch(42.4% 0.037 258.9)
- #594C37
#594C37
oklch(42.4% 0.037 79.4)
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 #424F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dusty Grape #545775 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Dusk #4E5481 ΔE 0.054
- Charcoal #264653 ΔE 0.055
- Deep Teal #00555A ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.063
Use #424F63 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.