#2B4147
Closest named color: Charcoal (#264653). oklch(35.9% 0.029 216.6), rgb(43, 65, 71).
Aa
White text reads best on this color (10.77:1).
About this color
#2B4147 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Charcoal (#264653), ΔE 0.022 away. White text reads best on it, at 10.77:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Charcoal (#264653) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #2B4147 |
| RGB | rgb(43, 65, 71) |
| HSL | hsl(193, 25%, 22%) |
| OKLCH | oklch(35.9% 0.029 216.6) |
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 #2B4147 | 10.77:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #2B4147 | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #2B4147 text on white | 10.77:1 | AAA | Lc 94.9 | Preferred for body text |
| #2B4147 text on black | 1.94:1 | Fails | Lc -7.7 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDE
oklch(88.5% 0.012 217.6)
-
Step 300
300
#B2C4CA
oklch(80.8% 0.021 219.7)
-
Step 400
400
#89A7AF
oklch(70.8% 0.035 215.7)
-
Step 500
500
#6A919B
oklch(63.1% 0.045 215.3)
-
Step 600
600
#517B86
oklch(55.6% 0.049 216)
-
Step 700
700
#426771
oklch(49% 0.045 216.7)
-
Step 800
800
#37545C
oklch(42.6% 0.037 216.9)
-
Step 900
900 (this color)
#2B4147
oklch(35.9% 0.029 216.6)
-
Step 950
950
#1C292C
oklch(27% 0.019 213.5)
#2B4147 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) | #3D4047 | 0.026 |
| Deuteranopia (no green cones) | #383C47 | 0.024 |
| Tritanopia (no blue cones) | #214343 | 0.016 |
| Achromatopsia (no color) | #3E3E3E | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4147
#2B4147
oklch(35.9% 0.029 216.6)
- #4B3832
#4B3832
oklch(36% 0.029 38.2)
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 #2B4147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.022
- Onyx #343A40 ΔE 0.024
- Charcoal Grey #3C4142 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.034
- Midnight Green #073B4C ΔE 0.043
- Dark Teal #014D4E ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
Use #2B4147 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.