#425354
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.8% 0.021 200.8), rgb(66, 83, 84).
Aa
White text reads best on this color (8.08:1).
About this color
#425354 is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.030 away. White text reads best on it, at 8.08:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #425354 |
| RGB | rgb(66, 83, 84) |
| HSL | hsl(183, 12%, 29%) |
| OKLCH | oklch(42.8% 0.021 200.8) |
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 #425354 | 8.08:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #425354 | 2.59:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #425354 text on white | 8.08:1 | AAA | Lc 88.0 | Fine for body text |
| #425354 text on black | 2.59:1 | Fails | Lc -14.2 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEB
oklch(93.5% 0.004 219.5)
-
Step 200
200
#D4DADB
oklch(88.4% 0.007 208.8)
-
Step 300
300
#B8C3C4
oklch(80.9% 0.012 203.4)
-
Step 400
400
#93A5A6
oklch(70.8% 0.02 200.8)
-
Step 500
500
#788E90
oklch(63% 0.025 203.3)
-
Step 600
600
#61787A
oklch(55.5% 0.027 202.9)
-
Step 700
700
#506567
oklch(49% 0.025 203.5)
-
Step 800
800 (this color)
#425354
oklch(42.8% 0.021 200.8)
-
Step 900
900
#384445
oklch(37.6% 0.016 202.7)
-
Step 950
950
#212828
oklch(27% 0.01 196.6)
#425354 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) | #505154 | 0.021 |
| Deuteranopia (no green cones) | #4D4F54 | 0.020 |
| Tritanopia (no blue cones) | #3C5453 | 0.009 |
| Achromatopsia (no color) | #505050 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425354
#425354
oklch(42.8% 0.021 200.8)
- #5B4B4A
#5B4B4A
oklch(42.9% 0.022 22.3)
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 #425354, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.030
- Deep Teal #00555A ΔE 0.052
- YInMn Blue #415A77 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.057
- Petrol #005F6A ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.059
- Charcoal #264653 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.060
Use #425354 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.