#2B3440
Closest named color: Gunmetal (#293241). oklch(32.2% 0.025 255.7), rgb(43, 52, 64).
Aa
White text reads best on this color (12.59:1).
About this color
#2B3440 is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.008 away. White text reads best on it, at 12.59:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #2B3440 |
| RGB | rgb(43, 52, 64) |
| HSL | hsl(214, 20%, 21%) |
| OKLCH | oklch(32.2% 0.025 255.7) |
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 #2B3440 | 12.59:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #2B3440 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #2B3440 text on white | 12.59:1 | AAA | Lc 98.6 | Preferred for body text |
| #2B3440 text on black | 1.66:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8EA2BE
oklch(70.6% 0.047 256.8)
-
Step 500
500
#728BAE
oklch(63% 0.06 256.8)
-
Step 600
600
#5A7599
oklch(55.6% 0.065 255.8)
-
Step 700
700
#4A6283
oklch(49.1% 0.061 256.5)
-
Step 800
800
#3D506A
oklch(42.7% 0.05 256.4)
-
Step 900
900
#344356
oklch(37.8% 0.038 254.6)
-
Step 950
950 (this color)
#2B3440
oklch(32.2% 0.025 255.7)
#2B3440 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) | #303441 | 0.008 |
| Deuteranopia (no green cones) | #2D3240 | 0.007 |
| Tritanopia (no blue cones) | #253738 | 0.022 |
| Achromatopsia (no color) | #333333 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3440
#2B3440
oklch(32.2% 0.025 255.7)
- #3B3225
#3B3225
oklch(32.3% 0.025 76.8)
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 #2B3440, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.008
- Space Cadet #2B2D42 ΔE 0.025
- Onyx #343A40 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.029
- Midnight Green #073B4C ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.056
Use #2B3440 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.