#2B4DA9
Closest named color: Cobalt (#1E488F). oklch(45% 0.153 265.3), rgb(43, 77, 169).
Aa
White text reads best on this color (7.67:1).
About this color
#2B4DA9 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.153 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.047 away. White text reads best on it, at 7.67:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #2B4DA9 |
| RGB | rgb(43, 77, 169) |
| HSL | hsl(224, 59%, 42%) |
| OKLCH | oklch(45% 0.153 265.3) |
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 #2B4DA9 | 7.67:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #2B4DA9 | 2.73:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #2B4DA9 text on white | 7.67:1 | AAA | Lc 86.2 | Fine for body text |
| #2B4DA9 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A5C0FB
oklch(80.9% 0.089 265.4)
-
Step 400
400
#759DFA
oklch(70.7% 0.144 265.3)
-
Step 500
500
#5381F7
oklch(63.1% 0.183 265.4)
-
Step 600
600
#3967E6
oklch(55.6% 0.199 265.3)
-
Step 700
700
#2C55C8
oklch(49.2% 0.185 265.2)
-
Step 800
800 (this color)
#2B4DA9
oklch(45% 0.153 265.3)
-
Step 900
900
#223C80
oklch(37.7% 0.119 265.3)
-
Step 950
950
#14244B
oklch(27.1% 0.075 265)
#2B4DA9 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) | #0259AC | 0.034 |
| Deuteranopia (no green cones) | #004EA7 | 0.025 |
| Tritanopia (no blue cones) | #006373 | 0.121 |
| Achromatopsia (no color) | #535353 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4DA9
#2B4DA9
oklch(45% 0.153 265.3)
- #6C5000
#6C5000
oklch(44.9% 0.092 85.2)
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 #2B4DA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Dusk Blue #26538D ΔE 0.051
- Sapphire #2138AB ΔE 0.054
- Blue Blue #2242C7 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.061
- Light Navy #155084 ΔE 0.066
- Twilight #4E518B ΔE 0.067
Use #2B4DA9 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.