#425455
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.1% 0.022 200.5), rgb(66, 84, 85).
Aa
White text reads best on this color (7.98:1).
About this color
#425455 is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.032 away. White text reads best on it, at 7.98:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.63:1 |
| White text | 7.98:1 |
Values
| HEX | #425455 |
| RGB | rgb(66, 84, 85) |
| HSL | hsl(183, 13%, 30%) |
| OKLCH | oklch(43.1% 0.022 200.5) |
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 #425455 | 7.98:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #425455 | 2.63:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #425455 text on white | 7.98:1 | AAA | Lc 87.7 | Fine for body text |
| #425455 text on black | 2.63:1 | Fails | Lc -14.5 | 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
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D4DBDB
oklch(88.6% 0.008 197)
-
Step 300
300
#B7C3C4
oklch(80.8% 0.013 202.9)
-
Step 400
400
#92A5A6
oklch(70.7% 0.021 200.5)
-
Step 500
500
#778F90
oklch(63.2% 0.027 199.6)
-
Step 600
600
#60797A
oklch(55.7% 0.029 199.4)
-
Step 700
700
#4F6667
oklch(49.2% 0.027 199.6)
-
Step 800
800 (this color)
#425455
oklch(43.1% 0.022 200.5)
-
Step 900
900
#374545
oklch(37.8% 0.018 196.4)
-
Step 950
950
#202829
oklch(27% 0.011 205.8)
#425455 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) | #515255 | 0.023 |
| Deuteranopia (no green cones) | #4E4F55 | 0.023 |
| Tritanopia (no blue cones) | #3C5554 | 0.009 |
| Achromatopsia (no color) | #515151 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425455
#425455
oklch(43.1% 0.022 200.5)
- #5C4B4B
#5C4B4B
oklch(43% 0.023 18.1)
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 #425455, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.032
- Deep Teal #00555A ΔE 0.052
- YInMn Blue #415A77 ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.055
- Petrol #005F6A ΔE 0.056
- Dusty Grape #545775 ΔE 0.061
- Charcoal #264653 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.062
Use #425455 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.