#2A3176
Closest named color: Marine Blue (#01386A). oklch(35% 0.117 274.3), rgb(42, 49, 118).
Aa
White text reads best on this color (11.67:1).
About this color
#2A3176 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.117 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.045 away. White text reads best on it, at 11.67:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #2A3176 |
| RGB | rgb(42, 49, 118) |
| HSL | hsl(234, 48%, 31%) |
| OKLCH | oklch(35% 0.117 274.3) |
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 #2A3176 | 11.67:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #2A3176 | 1.79:1 | Fails | Lc 7.4 | Not readable |
| #2A3176 text on white | 11.67:1 | AAA | Lc 96.5 | Preferred for body text |
| #2A3176 text on black | 1.79:1 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD7FA
oklch(88.4% 0.049 275.2)
-
Step 300
300
#AFBDFA
oklch(80.9% 0.088 274.3)
-
Step 400
400
#8698F7
oklch(70.6% 0.14 274.1)
-
Step 500
500
#6B7BF4
oklch(63.1% 0.18 274.4)
-
Step 600
600
#5561E3
oklch(55.7% 0.195 274.2)
-
Step 700
700
#464FC5
oklch(49.1% 0.181 274.3)
-
Step 800
800
#39419F
oklch(42.6% 0.151 274.4)
-
Step 900
900 (this color)
#2A3176
oklch(35% 0.117 274.3)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#2A3176 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) | #003C78 | 0.041 |
| Deuteranopia (no green cones) | #003575 | 0.037 |
| Tritanopia (no blue cones) | #00414E | 0.099 |
| Achromatopsia (no color) | #383838 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3176
#2A3176
oklch(35% 0.117 274.3)
- #473900
#473900
oklch(34.9% 0.072 93.4)
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 #2A3176, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.045
- Twilight Blue #0A437A ΔE 0.053
- Marine #042E60 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.060
- Midnight Blue #191970 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.070
- Cobalt #1E488F ΔE 0.071
- Blueberry #464196 ΔE 0.082
Use #2A3176 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.