#424550
Closest named color: Charcoal Grey (#3C4142). oklch(39.2% 0.019 273.4), rgb(66, 69, 80).
Aa
White text reads best on this color (9.55:1).
About this color
#424550 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.027 away. White text reads best on it, at 9.55:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #424550 |
| RGB | rgb(66, 69, 80) |
| HSL | hsl(227, 10%, 29%) |
| OKLCH | oklch(39.2% 0.019 273.4) |
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 #424550 | 9.55:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #424550 | 2.19:1 | Fails | Lc 11.8 | Not readable |
| #424550 text on white | 9.55:1 | AAA | Lc 92.1 | Preferred for body text |
| #424550 text on black | 2.19:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9DE
oklch(88.5% 0.007 268.5)
-
Step 300
300
#BDC0CA
oklch(80.8% 0.014 272.7)
-
Step 400
400
#9CA0AF
oklch(70.7% 0.022 273.9)
-
Step 500
500
#83899C
oklch(63.2% 0.029 271.6)
-
Step 600
600
#6D7286
oklch(55.5% 0.032 274.3)
-
Step 700
700
#5B6072
oklch(49.1% 0.029 273)
-
Step 800
800
#4A4E5D
oklch(42.6% 0.025 273.5)
-
Step 900
900 (this color)
#424550
oklch(39.2% 0.019 273.4)
-
Step 950
950
#24262C
oklch(26.9% 0.012 271)
#424550 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) | #424651 | 0.003 |
| Deuteranopia (no green cones) | #414550 | 0.002 |
| Tritanopia (no blue cones) | #3F4749 | 0.016 |
| Achromatopsia (no color) | #454545 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424550
#424550
oklch(39.2% 0.019 273.4)
- #49453A
#49453A
oklch(39.1% 0.019 90.4)
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 #424550, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.037
- Charcoal #264653 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.040
- Onyx #343A40 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.062
- Dark Teal #014D4E ΔE 0.064
- Deep Teal #00555A ΔE 0.068
Use #424550 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.