#2B3D48
Closest named color: Onyx (#343A40). oklch(34.9% 0.03 235.6), rgb(43, 61, 72).
Aa
White text reads best on this color (11.26:1).
About this color
#2B3D48 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.030 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.018 away. White text reads best on it, at 11.26:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #2B3D48 |
| RGB | rgb(43, 61, 72) |
| HSL | hsl(203, 25%, 23%) |
| OKLCH | oklch(34.9% 0.03 235.6) |
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 #2B3D48 | 11.26:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #2B3D48 | 1.86:1 | Fails | Lc 7.9 | Not readable |
| #2B3D48 text on white | 11.26:1 | AAA | Lc 96.0 | Preferred for body text |
| #2B3D48 text on black | 1.86:1 | 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
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D2DBE0
oklch(88.6% 0.012 231.7)
-
Step 300
300
#B3C3CD
oklch(80.8% 0.023 235.1)
-
Step 400
400
#8CA5B4
oklch(70.8% 0.035 234.3)
-
Step 500
500
#6F8EA2
oklch(63% 0.046 236.8)
-
Step 600
600
#56788D
oklch(55.5% 0.051 236)
-
Step 700
700
#476578
oklch(49.1% 0.047 236.8)
-
Step 800
800
#3A5361
oklch(42.8% 0.038 233.4)
-
Step 900
900 (this color)
#2B3D48
oklch(34.9% 0.03 235.6)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#2B3D48 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) | #383C49 | 0.020 |
| Deuteranopia (no green cones) | #343948 | 0.018 |
| Tritanopia (no blue cones) | #214041 | 0.022 |
| Achromatopsia (no color) | #3B3B3B | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3D48
#2B3D48
oklch(34.9% 0.03 235.6)
- #47362B
#47362B
oklch(34.8% 0.031 54.4)
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 #2B3D48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.018
- Dark Blue Grey #1F3B4D ΔE 0.020
- Charcoal #264653 ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.032
- Midnight Green #073B4C ΔE 0.036
- Gunmetal #293241 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.047
Use #2B3D48 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.