#42595B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.6% 0.028 202.9), rgb(66, 89, 91).
Aa
White text reads best on this color (7.46:1).
About this color
#42595B is a dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.044 away. White text reads best on it, at 7.46:1.
| Hue family | Neutrals |
| Lightness | dark (45%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #42595B |
| RGB | rgb(66, 89, 91) |
| HSL | hsl(185, 16%, 31%) |
| OKLCH | oklch(44.6% 0.028 202.9) |
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 #42595B | 7.46:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #42595B | 2.81:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #42595B text on white | 7.46:1 | AAA | Lc 85.9 | Fine for body text |
| #42595B text on black | 2.81:1 | Fails | Lc -16.1 | 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
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B5C4C5
oklch(80.9% 0.017 201.7)
-
Step 400
400
#8EA6A8
oklch(70.7% 0.027 202.7)
-
Step 500
500
#729092
oklch(63.1% 0.034 201.4)
-
Step 600
600
#5A7A7D
oklch(55.6% 0.037 203.4)
-
Step 700
700
#4A6769
oklch(49.2% 0.034 201.4)
-
Step 800
800 (this color)
#42595B
oklch(44.6% 0.028 202.9)
-
Step 900
900
#344547
oklch(37.7% 0.022 205.2)
-
Step 950
950
#1F2929
oklch(27.1% 0.014 196.4)
#42595B 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) | #56575B | 0.029 |
| Deuteranopia (no green cones) | #51535B | 0.027 |
| Tritanopia (no blue cones) | #3A5B5A | 0.012 |
| Achromatopsia (no color) | #555555 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42595B
#42595B
oklch(44.6% 0.028 202.9)
- #634E4D
#634E4D
oklch(44.5% 0.028 21.5)
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 #42595B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.044
- YInMn Blue #415A77 ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.047
- Petrol #005F6A ΔE 0.049
- Slate #516572 ΔE 0.052
- Dusty Grape #545775 ΔE 0.054
- Deep Teal #00555A ΔE 0.056
- Dark Aqua #05696B ΔE 0.058
Use #42595B 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.