#2B4B87
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.107 261.8), rgb(43, 75, 135).
Aa
White text reads best on this color (8.54:1).
About this color
#2B4B87 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.107 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.54:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #2B4B87 |
| RGB | rgb(43, 75, 135) |
| HSL | hsl(219, 52%, 35%) |
| OKLCH | oklch(42.1% 0.107 261.8) |
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 #2B4B87 | 8.54:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #2B4B87 | 2.45:1 | Fails | Lc 14.9 | Not readable |
| #2B4B87 text on white | 8.54:1 | AAA | Lc 89.1 | Fine for body text |
| #2B4B87 text on black | 2.45:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA1DF
oklch(70.8% 0.099 261.5)
-
Step 500
500
#5D88D6
oklch(63.1% 0.127 261.5)
-
Step 600
600
#4470C4
oklch(55.6% 0.14 262)
-
Step 700
700
#355EA9
oklch(49.2% 0.129 261.4)
-
Step 800
800 (this color)
#2B4B87
oklch(42.1% 0.107 261.8)
-
Step 900
900
#28406E
oklch(37.6% 0.085 262.3)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#2B4B87 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) | #2F5189 | 0.019 |
| Deuteranopia (no green cones) | #204886 | 0.015 |
| Tritanopia (no blue cones) | #005962 | 0.089 |
| Achromatopsia (no color) | #4C4C4C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4B87
#2B4B87
oklch(42.1% 0.107 261.8)
- #654800
#654800
oklch(42.2% 0.087 82.1)
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 #2B4B87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.023
- Deep Sea Blue #015482 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.045
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.052
Use #2B4B87 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.