#2B4663
Closest named color: Dark Grey Blue (#29465B). oklch(38.6% 0.06 251.2), rgb(43, 70, 99).
Aa
White text reads best on this color (9.72:1).
About this color
#2B4663 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.060 and its hue 251°. 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 9.72:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #2B4663 |
| RGB | rgb(43, 70, 99) |
| HSL | hsl(211, 39%, 28%) |
| OKLCH | oklch(38.6% 0.06 251.2) |
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 #2B4663 | 9.72:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #2B4663 | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #2B4663 text on white | 9.72:1 | AAA | Lc 92.4 | Preferred for body text |
| #2B4663 text on black | 2.15:1 | Fails | Lc -10.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DD
oklch(80.8% 0.045 251.6)
-
Step 400
400
#80A4CC
oklch(70.7% 0.071 251.5)
-
Step 500
500
#5F8DBF
oklch(63.1% 0.091 251.4)
-
Step 600
600
#4476AC
oklch(55.5% 0.101 251.7)
-
Step 700
700
#366393
oklch(49% 0.092 251.6)
-
Step 800
800
#2D5178
oklch(42.7% 0.077 251.8)
-
Step 900
900 (this color)
#2B4663
oklch(38.6% 0.06 251.2)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#2B4663 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) | #3A4764 | 0.021 |
| Deuteranopia (no green cones) | #334262 | 0.015 |
| Tritanopia (no blue cones) | #0B4D50 | 0.053 |
| Achromatopsia (no color) | #444444 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4663
#2B4663
oklch(38.6% 0.06 251.2)
- #583E1D
#583E1D
oklch(38.6% 0.06 70.9)
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 #2B4663, 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
- Twilight Blue #0A437A ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.057
- Light Navy #155084 ΔE 0.058
- Dark Teal #014D4E ΔE 0.058
Use #2B4663 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.