#2B4CAD
Closest named color: Blue Blue (#2242C7). oklch(45.2% 0.16 265.9), rgb(43, 76, 173).
Aa
White text reads best on this color (7.66:1).
About this color
#2B4CAD is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.160 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.048 away. White text reads best on it, at 7.66:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.73:1 |
| White text | 7.66:1 |
Values
| HEX | #2B4CAD |
| RGB | rgb(43, 76, 173) |
| HSL | hsl(225, 60%, 42%) |
| OKLCH | oklch(45.2% 0.16 265.9) |
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 #2B4CAD | 7.66:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #2B4CAD | 2.73:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #2B4CAD text on white | 7.66:1 | AAA | Lc 86.1 | Fine for body text |
| #2B4CAD text on black | 2.73:1 | Fails | Lc -15.9 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FE
oklch(81% 0.093 265.6)
-
Step 400
400
#749CFD
oklch(70.6% 0.149 265.8)
-
Step 500
500
#5280FB
oklch(63.1% 0.19 265.8)
-
Step 600
600
#3965EB
oklch(55.6% 0.208 265.9)
-
Step 700
700
#2C53CC
oklch(49.2% 0.193 265.8)
-
Step 800
800 (this color)
#2B4CAD
oklch(45.2% 0.16 265.9)
-
Step 900
900
#223B83
oklch(37.7% 0.125 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#2B4CAD 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) | #0059B0 | 0.036 |
| Deuteranopia (no green cones) | #004DAB | 0.025 |
| Tritanopia (no blue cones) | #006475 | 0.127 |
| Achromatopsia (no color) | #535353 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4CAD
#2B4CAD
oklch(45.2% 0.16 265.9)
- #6C5100
#6C5100
oklch(45.1% 0.092 86.3)
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 #2B4CAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.048
- Sapphire #2138AB ΔE 0.051
- Cobalt #1E488F ΔE 0.052
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.058
- Majorelle Blue #3F37C9 ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
Use #2B4CAD 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.