#2B4084
Closest named color: Cobalt (#1E488F). oklch(39.4% 0.117 267.8), rgb(43, 64, 132).
Aa
White text reads best on this color (9.68:1).
About this color
#2B4084 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.117 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.68:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #2B4084 |
| RGB | rgb(43, 64, 132) |
| HSL | hsl(226, 51%, 34%) |
| OKLCH | oklch(39.4% 0.117 267.8) |
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 #2B4084 | 9.68:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #2B4084 | 2.16:1 | Fails | Lc 11.8 | Not readable |
| #2B4084 text on white | 9.68:1 | AAA | Lc 92.1 | Preferred for body text |
| #2B4084 text on black | 2.16:1 | Fails | Lc -10.3 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFFA
oklch(80.9% 0.088 267.9)
-
Step 400
400
#7B9CF8
oklch(70.8% 0.14 267.8)
-
Step 500
500
#5B80F5
oklch(63.2% 0.179 267.8)
-
Step 600
600
#4366E3
oklch(55.6% 0.194 267.7)
-
Step 700
700
#3553C6
oklch(49% 0.182 267.8)
-
Step 800
800
#2C45A0
oklch(42.7% 0.151 267.8)
-
Step 900
900 (this color)
#2B4084
oklch(39.4% 0.117 267.8)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#2B4084 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) | #1A4986 | 0.027 |
| Deuteranopia (no green cones) | #014183 | 0.031 |
| Tritanopia (no blue cones) | #00505B | 0.099 |
| Achromatopsia (no color) | #444444 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4084
#2B4084
oklch(39.4% 0.117 267.8)
- #584300
#584300
oklch(39.4% 0.081 88.3)
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 #2B4084, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Twilight Blue #0A437A ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.044
- Light Navy #155084 ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Dusk Blue #26538D ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.061
- Marine Blue #01386A ΔE 0.064
Use #2B4084 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.