#2B4CA3
Closest named color: Cobalt (#1E488F). oklch(44.4% 0.146 265.2), rgb(43, 76, 163).
Aa
White text reads best on this color (7.87:1).
About this color
#2B4CA3 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.146 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.037 away. White text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #2B4CA3 |
| RGB | rgb(43, 76, 163) |
| HSL | hsl(224, 58%, 40%) |
| OKLCH | oklch(44.4% 0.146 265.2) |
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 #2B4CA3 | 7.87:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #2B4CA3 | 2.66:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #2B4CA3 text on white | 7.87:1 | AAA | Lc 86.9 | Fine for body text |
| #2B4CA3 text on black | 2.66:1 | Fails | Lc -15.2 | Dividers and decoration only |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A6C0F9
oklch(80.9% 0.086 265.5)
-
Step 400
400
#779DF6
oklch(70.6% 0.138 265.5)
-
Step 500
500
#5582F2
oklch(63.1% 0.175 265.3)
-
Step 600
600
#3C68E0
oklch(55.5% 0.19 265.4)
-
Step 700
700
#2E56C3
oklch(49.1% 0.177 265.1)
-
Step 800
800 (this color)
#2B4CA3
oklch(44.4% 0.146 265.2)
-
Step 900
900
#233D7D
oklch(37.7% 0.113 264.9)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#2B4CA3 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) | #0F57A6 | 0.031 |
| Deuteranopia (no green cones) | #004CA1 | 0.026 |
| Tritanopia (no blue cones) | #006170 | 0.116 |
| Achromatopsia (no color) | #515151 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4CA3
#2B4CA3
oklch(44.4% 0.146 265.2)
- #6A4F00
#6A4F00
oklch(44.4% 0.091 85.8)
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 #2B4CA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.043
- Blueberry #464196 ΔE 0.044
- Sapphire #2138AB ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Twilight #4E518B ΔE 0.062
Use #2B4CA3 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.