#425554
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.3% 0.024 192.3), rgb(66, 85, 84).
Aa
White text reads best on this color (7.89:1).
About this color
#425554 is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 7.89:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #425554 |
| RGB | rgb(66, 85, 84) |
| HSL | hsl(177, 13%, 30%) |
| OKLCH | oklch(43.3% 0.024 192.3) |
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 #425554 | 7.89:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #425554 | 2.65:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #425554 text on white | 7.89:1 | AAA | Lc 87.4 | Fine for body text |
| #425554 text on black | 2.65:1 | Fails | Lc -14.7 | 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
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D4DBDA
oklch(88.6% 0.008 186.9)
-
Step 300
300
#B7C4C3
oklch(81% 0.014 191.3)
-
Step 400
400
#92A5A4
oklch(70.7% 0.021 192.8)
-
Step 500
500
#778F8E
oklch(63.1% 0.027 193.4)
-
Step 600
600
#5F7978
oklch(55.5% 0.03 193.4)
-
Step 700
700
#4E6665
oklch(49.1% 0.029 193.1)
-
Step 800
800 (this color)
#425554
oklch(43.3% 0.024 192.3)
-
Step 900
900
#374544
oklch(37.8% 0.018 191.1)
-
Step 950
950
#202828
oklch(26.9% 0.011 196.5)
#425554 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) | #535354 | 0.025 |
| Deuteranopia (no green cones) | #4F5054 | 0.024 |
| Tritanopia (no blue cones) | #3C5655 | 0.008 |
| Achromatopsia (no color) | #515151 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425554
#425554
oklch(43.3% 0.024 192.3)
- #5D4C4D
#5D4C4D
oklch(43.4% 0.023 14.1)
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 #425554, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- Dark Green Blue #1F6357 ΔE 0.052
- Deep Teal #00555A ΔE 0.052
- Petrol #005F6A ΔE 0.055
- YInMn Blue #415A77 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.062
- Dusty Grape #545775 ΔE 0.063
- Charcoal #264653 ΔE 0.064
Use #425554 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.