#2B4384
Closest named color: Cobalt (#1E488F). oklch(40% 0.113 266.2), rgb(43, 67, 132).
Aa
White text reads best on this color (9.38:1).
About this color
#2B4384 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.113 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #2B4384 |
| RGB | rgb(43, 67, 132) |
| HSL | hsl(224, 51%, 34%) |
| OKLCH | oklch(40% 0.113 266.2) |
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 #2B4384 | 9.38:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #2B4384 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #2B4384 text on white | 9.38:1 | AAA | Lc 91.4 | Preferred for body text |
| #2B4384 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#799DF5
oklch(70.7% 0.135 266.2)
-
Step 500
500
#5882F1
oklch(63.2% 0.173 266)
-
Step 600
600
#3F68E0
oklch(55.6% 0.189 266.1)
-
Step 700
700
#3256C2
oklch(49.2% 0.174 266.1)
-
Step 800
800
#29479D
oklch(42.7% 0.145 265.9)
-
Step 900
900 (this color)
#2B4384
oklch(40% 0.113 266.2)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#2B4384 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) | #214B86 | 0.023 |
| Deuteranopia (no green cones) | #0E4383 | 0.025 |
| Tritanopia (no blue cones) | #00525D | 0.094 |
| Achromatopsia (no color) | #464646 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4384
#2B4384
oklch(40% 0.113 266.2)
- #5B4400
#5B4400
oklch(40% 0.082 86.6)
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 #2B4384, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Twilight Blue #0A437A ΔE 0.033
- Light Navy #155084 ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk Blue #26538D ΔE 0.046
- Blueberry #464196 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.053
- Twilight #4E518B ΔE 0.067
Use #2B4384 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.