#425759
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44% 0.026 203.5), rgb(66, 87, 89).
Aa
White text reads best on this color (7.66:1).
About this color
#425759 is a dark close to neutral grey. In OKLCH its lightness is 44%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.039 away. White text reads best on it, at 7.66:1.
| Hue family | Neutrals |
| Lightness | dark (44%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.73:1 |
| White text | 7.66:1 |
Values
| HEX | #425759 |
| RGB | rgb(66, 87, 89) |
| HSL | hsl(185, 15%, 30%) |
| OKLCH | oklch(44% 0.026 203.5) |
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 #425759 | 7.66:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #425759 | 2.73:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #425759 text on white | 7.66:1 | AAA | Lc 86.6 | Fine for body text |
| #425759 text on black | 2.73:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#D3DBDB
oklch(88.5% 0.009 197)
-
Step 300
300
#B6C4C5
oklch(81% 0.015 202)
-
Step 400
400
#90A5A7
oklch(70.6% 0.024 203.6)
-
Step 500
500
#748F92
oklch(63% 0.031 204.7)
-
Step 600
600
#5C797C
oklch(55.5% 0.034 204.1)
-
Step 700
700
#4C6669
oklch(49.1% 0.031 205)
-
Step 800
800 (this color)
#425759
oklch(44% 0.026 203.5)
-
Step 900
900
#354546
oklch(37.7% 0.021 201.1)
-
Step 950
950
#1F2829
oklch(26.9% 0.013 204.7)
#425759 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) | #545559 | 0.026 |
| Deuteranopia (no green cones) | #505259 | 0.024 |
| Tritanopia (no blue cones) | #3B5958 | 0.011 |
| Achromatopsia (no color) | #535353 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425759
#425759
oklch(44% 0.026 203.5)
- #604D4C
#604D4C
oklch(43.9% 0.026 21.7)
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 #425759, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.039
- YInMn Blue #415A77 ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.050
- Petrol #005F6A ΔE 0.051
- Deep Teal #00555A ΔE 0.054
- Dusty Grape #545775 ΔE 0.056
- Slate #516572 ΔE 0.058
- Dark Aqua #05696B ΔE 0.063
Use #425759 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.