#2A2F78
Closest named color: Marine Blue (#01386A). oklch(34.8% 0.123 275), rgb(42, 47, 120).
Aa
White text reads best on this color (11.82:1).
About this color
#2A2F78 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.123 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.049 away. White text reads best on it, at 11.82:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #2A2F78 |
| RGB | rgb(42, 47, 120) |
| HSL | hsl(236, 48%, 32%) |
| OKLCH | oklch(34.8% 0.123 275) |
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 #2A2F78 | 11.82:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #2A2F78 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #2A2F78 text on white | 11.82:1 | AAA | Lc 96.8 | Preferred for body text |
| #2A2F78 text on black | 1.77:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFC
oklch(80.8% 0.092 275.3)
-
Step 400
400
#8797FB
oklch(70.7% 0.147 275.1)
-
Step 500
500
#6C79F9
oklch(63.1% 0.189 275.2)
-
Step 600
600
#565EE8
oklch(55.6% 0.205 275)
-
Step 700
700
#474CC9
oklch(49% 0.19 275.1)
-
Step 800
800
#3A40A3
oklch(42.8% 0.157 274.9)
-
Step 900
900 (this color)
#2A2F78
oklch(34.8% 0.123 275)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#2A2F78 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) | #003B7A | 0.043 |
| Deuteranopia (no green cones) | #003477 | 0.038 |
| Tritanopia (no blue cones) | #00414E | 0.105 |
| Achromatopsia (no color) | #373737 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A2F78
#2A2F78
oklch(34.8% 0.123 275)
- #463900
#463900
oklch(34.8% 0.071 94.6)
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 #2A2F78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.049
- Twilight Blue #0A437A ΔE 0.058
- Marine #042E60 ΔE 0.059
- Midnight Blue #191970 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.071
- Cobalt #1E488F ΔE 0.074
- Royal #0C1793 ΔE 0.077
Use #2A2F78 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.