#2A3161
Closest named color: Prussian Blue (#1D3557). oklch(33.3% 0.084 274.6), rgb(42, 49, 97).
Aa
White text reads best on this color (12.27:1).
About this color
#2A3161 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.084 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 12.27:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.27:1 |
Values
| HEX | #2A3161 |
| RGB | rgb(42, 49, 97) |
| HSL | hsl(232, 40%, 27%) |
| OKLCH | oklch(33.3% 0.084 274.6) |
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 #2A3161 | 12.27:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #2A3161 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #2A3161 text on white | 12.27:1 | AAA | Lc 97.8 | Preferred for body text |
| #2A3161 text on black | 1.71:1 | 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
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B4BEEA
oklch(80.9% 0.063 274.9)
-
Step 400
400
#8E9CE0
oklch(70.8% 0.101 274.6)
-
Step 500
500
#7382D7
oklch(63.2% 0.129 274.6)
-
Step 600
600
#5C69C4
oklch(55.5% 0.141 274.8)
-
Step 700
700
#4C57AA
oklch(49.1% 0.132 274.8)
-
Step 800
800
#3E4889
oklch(42.7% 0.108 274.4)
-
Step 900
900 (this color)
#2A3161
oklch(33.3% 0.084 274.6)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#2A3161 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) | #1C3763 | 0.023 |
| Deuteranopia (no green cones) | #153360 | 0.026 |
| Tritanopia (no blue cones) | #103B44 | 0.074 |
| Achromatopsia (no color) | #353535 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3161
#2A3161
oklch(33.3% 0.084 274.6)
- #423500
#423500
oklch(33.3% 0.068 93.7)
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 #2A3161, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine Blue #01386A ΔE 0.040
- Marine #042E60 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.055
- Gunmetal #293241 ΔE 0.059
- Midnight Green #073B4C ΔE 0.064
- Twilight Blue #0A437A ΔE 0.064
Use #2A3161 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.