#425251
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.5% 0.02 191.7), rgb(66, 82, 81).
Aa
White text reads best on this color (8.21:1).
About this color
#425251 is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.028 away. White text reads best on it, at 8.21:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #425251 |
| RGB | rgb(66, 82, 81) |
| HSL | hsl(176, 11%, 29%) |
| OKLCH | oklch(42.5% 0.02 191.7) |
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 #425251 | 8.21:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #425251 | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #425251 text on white | 8.21:1 | AAA | Lc 88.4 | Fine for body text |
| #425251 text on black | 2.55:1 | 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
#E7EAEA
oklch(93.5% 0.003 197.1)
-
Step 200
200
#D4DADA
oklch(88.4% 0.007 197)
-
Step 300
300
#B8C3C2
oklch(80.8% 0.012 190.4)
-
Step 400
400
#94A5A3
oklch(70.8% 0.019 188.2)
-
Step 500
500
#798E8D
oklch(63% 0.024 193)
-
Step 600
600
#627877
oklch(55.5% 0.026 193)
-
Step 700
700
#516564
oklch(49% 0.024 192.6)
-
Step 800
800 (this color)
#425251
oklch(42.5% 0.02 191.7)
-
Step 900
900
#384444
oklch(37.6% 0.016 196.5)
-
Step 950
950
#212828
oklch(27% 0.01 196.6)
#425251 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) | #505051 | 0.021 |
| Deuteranopia (no green cones) | #4D4E51 | 0.020 |
| Tritanopia (no blue cones) | #3D5352 | 0.007 |
| Achromatopsia (no color) | #4F4F4F | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425251
#425251
oklch(42.5% 0.02 191.7)
- #594A4B
#594A4B
oklch(42.5% 0.02 13.4)
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 #425251, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.028
- Deep Teal #00555A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.055
- Charcoal #264653 ΔE 0.057
- Dark Green Blue #1F6357 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.059
- Dark Blue Green #005249 ΔE 0.059
- Petrol #005F6A ΔE 0.061
Use #425251 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.