#2B4252
Closest named color: Charcoal (#264653). oklch(36.7% 0.04 239.6), rgb(43, 66, 82).
Aa
White text reads best on this color (10.47:1).
About this color
#2B4252 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.040 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.013 away. White text reads best on it, at 10.47:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #2B4252 |
| RGB | rgb(43, 66, 82) |
| HSL | hsl(205, 31%, 25%) |
| OKLCH | oklch(36.7% 0.04 239.6) |
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 #2B4252 | 10.47:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2B4252 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #2B4252 text on white | 10.47:1 | AAA | Lc 94.3 | Preferred for body text |
| #2B4252 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE3
oklch(88.5% 0.016 239.1)
-
Step 300
300
#B0C4D2
oklch(81% 0.029 238.3)
-
Step 400
400
#86A5BC
oklch(70.7% 0.048 240.5)
-
Step 500
500
#678FAB
oklch(63.1% 0.061 239.5)
-
Step 600
600
#4E7996
oklch(55.6% 0.066 239)
-
Step 700
700
#3E6680
oklch(49.2% 0.062 238.3)
-
Step 800
800
#345368
oklch(42.7% 0.051 239.2)
-
Step 900
900 (this color)
#2B4252
oklch(36.7% 0.04 239.6)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#2B4252 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) | #3B4253 | 0.023 |
| Deuteranopia (no green cones) | #363D52 | 0.021 |
| Tritanopia (no blue cones) | #1B4647 | 0.032 |
| Achromatopsia (no color) | #3F3F3F | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4252
#2B4252
oklch(36.7% 0.04 239.6)
- #4F3A29
#4F3A29
oklch(36.7% 0.04 60.1)
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 #2B4252, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.013
- Dark Grey Blue #29465B ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.034
- Onyx #343A40 ΔE 0.035
- Midnight Green #073B4C ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
Use #2B4252 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.