#2B4243
Closest named color: Charcoal Grey (#3C4142). oklch(36.1% 0.029 199.4), rgb(43, 66, 67).
Aa
White text reads best on this color (10.69:1).
About this color
#2B4243 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 Grey (#3C4142), ΔE 0.024 away. White text reads best on it, at 10.69:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #2B4243 |
| RGB | rgb(43, 66, 67) |
| HSL | hsl(183, 22%, 22%) |
| OKLCH | oklch(36.1% 0.029 199.4) |
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 #2B4243 | 10.69:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #2B4243 | 1.96:1 | Fails | Lc 9.1 | Not readable |
| #2B4243 text on white | 10.69:1 | AAA | Lc 94.8 | Preferred for body text |
| #2B4243 text on black | 1.96:1 | Fails | Lc -7.8 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DCDC
oklch(88.6% 0.012 196.9)
-
Step 300
300
#B1C5C6
oklch(80.9% 0.022 200.4)
-
Step 400
400
#88A7A9
oklch(70.6% 0.034 201.3)
-
Step 500
500
#6A9294
oklch(63.1% 0.044 200)
-
Step 600
600
#517C7E
oklch(55.6% 0.048 199.6)
-
Step 700
700
#41696A
oklch(49.2% 0.045 197.8)
-
Step 800
800
#365557
oklch(42.6% 0.037 201)
-
Step 900
900 (this color)
#2B4243
oklch(36.1% 0.029 199.4)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#2B4243 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) | #3F4043 | 0.030 |
| Deuteranopia (no green cones) | #3A3D43 | 0.026 |
| Tritanopia (no blue cones) | #224442 | 0.012 |
| Achromatopsia (no color) | #3E3E3E | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4243
#2B4243
oklch(36.1% 0.029 199.4)
- #4B3737
#4B3737
oklch(35.9% 0.029 18.6)
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 #2B4243, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.024
- Charcoal #264653 ΔE 0.027
- Onyx #343A40 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.040
- Dark Teal #014D4E ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.043
- Midnight Green #073B4C ΔE 0.047
Use #2B4243 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.