#2B4963
Closest named color: Dark Grey Blue (#29465B). oklch(39.4% 0.057 246.1), rgb(43, 73, 99).
Aa
White text reads best on this color (9.39:1).
About this color
#2B4963 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.057 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.015 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #2B4963 |
| RGB | rgb(43, 73, 99) |
| HSL | hsl(208, 39%, 28%) |
| OKLCH | oklch(39.4% 0.057 246.1) |
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 #2B4963 | 9.39:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #2B4963 | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #2B4963 text on white | 9.39:1 | AAA | Lc 91.6 | Preferred for body text |
| #2B4963 text on black | 2.23:1 | Fails | Lc -10.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DB
oklch(80.9% 0.042 246.1)
-
Step 400
400
#7DA5C9
oklch(70.6% 0.069 246.1)
-
Step 500
500
#5B8FBB
oklch(63.1% 0.087 245.3)
-
Step 600
600
#4078A8
oklch(55.6% 0.096 246.5)
-
Step 700
700
#316590
oklch(49.1% 0.089 245.9)
-
Step 800
800
#2A5275
oklch(42.6% 0.074 247)
-
Step 900
900 (this color)
#2B4963
oklch(39.4% 0.057 246.1)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#2B4963 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) | #3E4964 | 0.025 |
| Deuteranopia (no green cones) | #374463 | 0.020 |
| Tritanopia (no blue cones) | #0A4F52 | 0.048 |
| Achromatopsia (no color) | #464646 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4963
#2B4963
oklch(39.4% 0.057 246.1)
- #5B4023
#5B4023
oklch(39.5% 0.057 66.8)
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 #2B4963, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.015
- Charcoal #264653 ΔE 0.029
- Dark Slate Gray #2F4F4F ΔE 0.045
- Deep Teal #00555A ΔE 0.051
- Dark Teal #014D4E ΔE 0.053
- Twilight Blue #0A437A ΔE 0.054
- Light Navy #155084 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.056
Use #2B4963 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.