#2B4263
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.064 257.4), rgb(43, 66, 99).
Aa
White text reads best on this color (10.18:1).
About this color
#2B4263 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.064 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 10.18:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #2B4263 |
| RGB | rgb(43, 66, 99) |
| HSL | hsl(215, 39%, 28%) |
| OKLCH | oklch(37.6% 0.064 257.4) |
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 #2B4263 | 10.18:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #2B4263 | 2.06:1 | Fails | Lc 10.4 | Not readable |
| #2B4263 text on white | 10.18:1 | AAA | Lc 93.5 | Preferred for body text |
| #2B4263 text on black | 2.06:1 | Fails | Lc -9.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#82A2D1
oklch(70.6% 0.078 257.9)
-
Step 500
500
#638BC4
oklch(63.1% 0.097 257.3)
-
Step 600
600
#4A74B1
oklch(55.6% 0.106 257.7)
-
Step 700
700
#3B6198
oklch(49.1% 0.099 257.6)
-
Step 800
800
#314F7B
oklch(42.6% 0.082 257.9)
-
Step 900
900 (this color)
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#2B4263 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) | #354464 | 0.016 |
| Deuteranopia (no green cones) | #2E3F62 | 0.009 |
| Tritanopia (no blue cones) | #0C494E | 0.056 |
| Achromatopsia (no color) | #414141 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4263
#2B4263
oklch(37.6% 0.064 257.4)
- #543D15
#543D15
oklch(37.7% 0.064 78.3)
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 #2B4263, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.045
- Twilight Blue #0A437A ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.049
- Marine Blue #01386A ΔE 0.053
- Midnight Green #073B4C ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.060
Use #2B4263 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.