#2D4A9B
Closest named color: Cobalt (#1E488F). oklch(43.4% 0.137 266), rgb(45, 74, 155).
Aa
White text reads best on this color (8.18:1).
About this color
#2D4A9B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.137 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #2D4A9B |
| RGB | rgb(45, 74, 155) |
| HSL | hsl(224, 55%, 39%) |
| OKLCH | oklch(43.4% 0.137 266) |
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 #2D4A9B | 8.18:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2D4A9B | 2.56:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #2D4A9B text on white | 8.18:1 | AAA | Lc 88.0 | Fine for body text |
| #2D4A9B text on black | 2.56:1 | Fails | Lc -14.2 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A8C0F5
oklch(80.9% 0.08 265.7)
-
Step 400
400
#7B9EF0
oklch(70.8% 0.127 265.7)
-
Step 500
500
#5A83EB
oklch(63.1% 0.163 265.8)
-
Step 600
600
#426ADA
oklch(55.7% 0.177 266)
-
Step 700
700
#3457BD
oklch(49.1% 0.166 266.1)
-
Step 800
800 (this color)
#2D4A9B
oklch(43.4% 0.137 266)
-
Step 900
900
#273D7A
oklch(37.7% 0.107 266.4)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#2D4A9B 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) | #18549E | 0.029 |
| Deuteranopia (no green cones) | #004A99 | 0.029 |
| Tritanopia (no blue cones) | #005D6B | 0.110 |
| Achromatopsia (no color) | #4F4F4F | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4A9B
#2D4A9B
oklch(43.4% 0.137 266)
- #664C00
#664C00
oklch(43.2% 0.089 85.9)
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 #2D4A9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Dusk Blue #26538D ΔE 0.037
- Blueberry #464196 ΔE 0.038
- Light Navy #155084 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.051
- Sapphire #2138AB ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.057
- Twilight #4E518B ΔE 0.057
Use #2D4A9B 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.