#2A305E
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.081 275.4), rgb(42, 48, 94).
Aa
White text reads best on this color (12.47:1).
About this color
#2A305E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.081 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 12.47:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.47:1 |
Values
| HEX | #2A305E |
| RGB | rgb(42, 48, 94) |
| HSL | hsl(233, 38%, 27%) |
| OKLCH | oklch(32.9% 0.081 275.4) |
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 #2A305E | 12.47:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #2A305E | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #2A305E text on white | 12.47:1 | AAA | Lc 98.2 | Preferred for body text |
| #2A305E text on black | 1.68:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B5BEE9
oklch(80.9% 0.062 275.7)
-
Step 400
400
#8F9CDD
oklch(70.8% 0.096 275)
-
Step 500
500
#7582D4
oklch(63.2% 0.124 275.5)
-
Step 600
600
#5E6AC1
oklch(55.6% 0.135 275.2)
-
Step 700
700
#4E58A7
oklch(49.2% 0.126 275.4)
-
Step 800
800
#404887
oklch(42.7% 0.104 275.6)
-
Step 900
900 (this color)
#2A305E
oklch(32.9% 0.081 275.4)
-
Step 950
950
#1F243F
oklch(27% 0.051 274.5)
#2A305E 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) | #1C3660 | 0.023 |
| Deuteranopia (no green cones) | #17325D | 0.024 |
| Tritanopia (no blue cones) | #143A42 | 0.072 |
| Achromatopsia (no color) | #343434 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A305E
#2A305E
oklch(32.9% 0.081 275.4)
- #403400
#403400
oklch(32.8% 0.067 94.7)
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 #2A305E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Marine #042E60 ΔE 0.042
- Marine Blue #01386A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.053
- Gunmetal #293241 ΔE 0.055
- Midnight Green #073B4C ΔE 0.062
- Twilight Blue #0A437A ΔE 0.069
Use #2A305E 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.