#2A4AA4
Closest named color: Cobalt (#1E488F). oklch(44% 0.15 265.7), rgb(42, 74, 164).
Aa
White text reads best on this color (8.03:1).
About this color
#2A4AA4 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.150 and its hue 266°. 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 8.03:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.61:1 |
| White text | 8.03:1 |
Values
| HEX | #2A4AA4 |
| RGB | rgb(42, 74, 164) |
| HSL | hsl(224, 59%, 40%) |
| OKLCH | oklch(44% 0.15 265.7) |
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 #2A4AA4 | 8.03:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #2A4AA4 | 2.61:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #2A4AA4 text on white | 8.03:1 | AAA | Lc 87.4 | Fine for body text |
| #2A4AA4 text on black | 2.61:1 | Fails | Lc -14.7 | 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
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF8
oklch(70.8% 0.14 265.8)
-
Step 500
500
#5581F5
oklch(63.1% 0.18 265.8)
-
Step 600
600
#3C67E4
oklch(55.6% 0.196 265.8)
-
Step 700
700
#2E55C6
oklch(49.1% 0.182 265.5)
-
Step 800
800 (this color)
#2A4AA4
oklch(44% 0.15 265.7)
-
Step 900
900
#233C7F
oklch(37.7% 0.118 265.6)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#2A4AA4 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) | #0056A7 | 0.035 |
| Deuteranopia (no green cones) | #004BA2 | 0.025 |
| Tritanopia (no blue cones) | #00606F | 0.121 |
| Achromatopsia (no color) | #505050 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4AA4
#2A4AA4
oklch(44% 0.15 265.7)
- #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 #2A4AA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.037
- Blueberry #464196 ΔE 0.044
- Sapphire #2138AB ΔE 0.047
- Dusk Blue #26538D ΔE 0.048
- Blue Blue #2242C7 ΔE 0.059
- Light Navy #155084 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.064
Use #2A4AA4 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.