#2A3944
Closest named color: Onyx (#343A40). oklch(33.6% 0.028 240.4), rgb(42, 57, 68).
Aa
White text reads best on this color (11.88:1).
About this color
#2A3944 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.017 away. White text reads best on it, at 11.88:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.76:1 |
| White text | 11.88:1 |
Values
| HEX | #2A3944 |
| RGB | rgb(42, 57, 68) |
| HSL | hsl(205, 24%, 22%) |
| OKLCH | oklch(33.6% 0.028 240.4) |
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 #2A3944 | 11.88:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #2A3944 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #2A3944 text on white | 11.88:1 | AAA | Lc 97.2 | Preferred for body text |
| #2A3944 text on black | 1.76:1 | 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 900.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B5C3CD
oklch(80.9% 0.021 238.7)
-
Step 400
400
#8FA4B4
oklch(70.8% 0.033 240.9)
-
Step 500
500
#738DA1
oklch(63% 0.042 241.4)
-
Step 600
600
#5B778C
oklch(55.5% 0.046 241)
-
Step 700
700
#4B6477
oklch(49.1% 0.043 241.5)
-
Step 800
800
#3D5261
oklch(42.7% 0.036 239.7)
-
Step 900
900 (this color)
#2A3944
oklch(33.6% 0.028 240.4)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#2A3944 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) | #343945 | 0.016 |
| Deuteranopia (no green cones) | #313644 | 0.014 |
| Tritanopia (no blue cones) | #213C3D | 0.022 |
| Achromatopsia (no color) | #373737 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3944
#2A3944
oklch(33.6% 0.028 240.4)
- #423428
#423428
oklch(33.7% 0.028 62.2)
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 #2A3944, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.019
- Gunmetal #293241 ΔE 0.023
- Midnight Green #073B4C ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.043
- Charcoal #264653 ΔE 0.043
Use #2A3944 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.