#283540
Closest named color: Gunmetal (#293241). oklch(32.2% 0.026 244.3), rgb(40, 53, 64).
Aa
White text reads best on this color (12.54:1).
About this color
#283540 is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.011 away. White text reads best on it, at 12.54:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.67:1 |
| White text | 12.54:1 |
Values
| HEX | #283540 |
| RGB | rgb(40, 53, 64) |
| HSL | hsl(207, 23%, 20%) |
| OKLCH | oklch(32.2% 0.026 244.3) |
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 #283540 | 12.54:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #283540 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #283540 text on white | 12.54:1 | AAA | Lc 98.5 | Preferred for body text |
| #283540 text on black | 1.67:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D4
oklch(80.8% 0.032 245.2)
-
Step 400
400
#87A5BE
oklch(70.8% 0.05 243.7)
-
Step 500
500
#688EAE
oklch(63.1% 0.064 244.5)
-
Step 600
600
#4F7899
oklch(55.6% 0.069 243.7)
-
Step 700
700
#406583
oklch(49.2% 0.064 244.1)
-
Step 800
800
#35526A
oklch(42.6% 0.053 244.5)
-
Step 900
900
#2E4456
oklch(37.6% 0.041 243.9)
-
Step 950
950 (this color)
#283540
oklch(32.2% 0.026 244.3)
#283540 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) | #313541 | 0.014 |
| Deuteranopia (no green cones) | #2D3240 | 0.012 |
| Tritanopia (no blue cones) | #203839 | 0.022 |
| Achromatopsia (no color) | #333333 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283540
#283540
oklch(32.2% 0.026 244.3)
- #3D3125
#3D3125
oklch(32.3% 0.027 66.6)
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 #283540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.011
- Dark Blue Grey #1F3B4D ΔE 0.027
- Onyx #343A40 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.028
- Midnight Green #073B4C ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.056
Use #283540 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.