#425253
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.5% 0.02 201.1), rgb(66, 82, 83).
Aa
White text reads best on this color (8.19:1).
About this color
#425253 is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 8.19:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #425253 |
| RGB | rgb(66, 82, 83) |
| HSL | hsl(184, 11%, 29%) |
| OKLCH | oklch(42.5% 0.02 201.1) |
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 #425253 | 8.19:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #425253 | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #425253 text on white | 8.19:1 | AAA | Lc 88.3 | Fine for body text |
| #425253 text on black | 2.56:1 | Fails | Lc -13.8 | 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
#94A4A5
oklch(70.6% 0.018 201.3)
-
Step 500
500
#798E8F
oklch(63.1% 0.024 200.1)
-
Step 600
600
#62787A
oklch(55.6% 0.026 203.2)
-
Step 700
700
#516566
oklch(49.1% 0.024 200.2)
-
Step 800
800 (this color)
#425253
oklch(42.5% 0.02 201.1)
-
Step 900
900
#384445
oklch(37.6% 0.016 202.7)
-
Step 950
950
#212828
oklch(27% 0.01 196.6)
#425253 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) | #505053 | 0.021 |
| Deuteranopia (no green cones) | #4C4E53 | 0.019 |
| Tritanopia (no blue cones) | #3D5352 | 0.008 |
| Achromatopsia (no color) | #4F4F4F | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425253
#425253
oklch(42.5% 0.02 201.1)
- #594A4A
#594A4A
oklch(42.4% 0.02 18)
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 #425253, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Deep Teal #00555A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.056
- Charcoal #264653 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.058
- YInMn Blue #415A77 ΔE 0.058
- Dark Green Blue #1F6357 ΔE 0.059
- Petrol #005F6A ΔE 0.060
Use #425253 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.