#2A4AA5
Closest named color: Cobalt (#1E488F). oklch(44% 0.152 265.8), rgb(42, 74, 165).
Aa
White text reads best on this color (8.01:1).
About this color
#2A4AA5 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.152 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.039 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #2A4AA5 |
| RGB | rgb(42, 74, 165) |
| HSL | hsl(224, 59%, 41%) |
| OKLCH | oklch(44% 0.152 265.8) |
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 #2A4AA5 | 8.01:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #2A4AA5 | 2.62:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2A4AA5 text on white | 8.01:1 | AAA | Lc 87.3 | Fine for body text |
| #2A4AA5 text on black | 2.62:1 | Fails | Lc -14.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FB
oklch(81% 0.089 266)
-
Step 400
400
#769DF9
oklch(70.7% 0.142 265.5)
-
Step 500
500
#5481F6
oklch(63.1% 0.182 265.6)
-
Step 600
600
#3B67E5
oklch(55.6% 0.198 265.7)
-
Step 700
700
#2E55C7
oklch(49.2% 0.183 265.6)
-
Step 800
800 (this color)
#2A4AA5
oklch(44% 0.152 265.8)
-
Step 900
900
#233C7F
oklch(37.7% 0.118 265.6)
-
Step 950
950
#15244B
oklch(27.1% 0.075 265.8)
#2A4AA5 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) | #0056A8 | 0.035 |
| Deuteranopia (no green cones) | #004BA3 | 0.025 |
| Tritanopia (no blue cones) | #006070 | 0.120 |
| Achromatopsia (no color) | #505050 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4AA5
#2A4AA5
oklch(44% 0.152 265.8)
- #694E00
#694E00
oklch(44.1% 0.09 85.6)
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 #2A4AA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.039
- Blueberry #464196 ΔE 0.045
- Sapphire #2138AB ΔE 0.047
- Dusk Blue #26538D ΔE 0.049
- Blue Blue #2242C7 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Light Navy #155084 ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.065
Use #2A4AA5 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.