#2B4684
Closest named color: Cobalt (#1E488F). oklch(40.7% 0.109 264.4), rgb(43, 70, 132).
Aa
White text reads best on this color (9.08:1).
About this color
#2B4684 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.109 and its hue 264°. 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 9.08:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #2B4684 |
| RGB | rgb(43, 70, 132) |
| HSL | hsl(222, 51%, 34%) |
| OKLCH | oklch(40.7% 0.109 264.4) |
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 #2B4684 | 9.08:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #2B4684 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #2B4684 text on white | 9.08:1 | AAA | Lc 90.6 | Preferred for body text |
| #2B4684 text on black | 2.31:1 | Fails | Lc -11.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#81A0E1
oklch(70.8% 0.102 264.4)
-
Step 500
500
#6187D8
oklch(63.2% 0.13 264)
-
Step 600
600
#486FC5
oklch(55.6% 0.141 264)
-
Step 700
700
#3A5CAB
oklch(49.1% 0.132 264.5)
-
Step 800
800 (this color)
#2B4684
oklch(40.7% 0.109 264.4)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#2B4684 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) | #284D86 | 0.020 |
| Deuteranopia (no green cones) | #184583 | 0.019 |
| Tritanopia (no blue cones) | #00545E | 0.091 |
| Achromatopsia (no color) | #484848 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4684
#2B4684
oklch(40.7% 0.109 264.4)
- #5F4500
#5F4500
oklch(40.8% 0.084 84)
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 #2B4684, 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 0.032
- Twilight Blue #0A437A ΔE 0.034
- Dusk Blue #26538D ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.059
Use #2B4684 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.