#2A3158
Closest named color: Prussian Blue (#1D3557). oklch(32.7% 0.07 274.2), rgb(42, 49, 88).
Aa
White text reads best on this color (12.50:1).
About this color
#2A3158 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.070 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.020 away. White text reads best on it, at 12.50:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.50:1 |
Values
| HEX | #2A3158 |
| RGB | rgb(42, 49, 88) |
| HSL | hsl(231, 35%, 25%) |
| OKLCH | oklch(32.7% 0.07 274.2) |
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 #2A3158 | 12.50:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #2A3158 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #2A3158 text on white | 12.50:1 | AAA | Lc 98.3 | Preferred for body text |
| #2A3158 text on black | 1.67:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B6BFE3
oklch(81% 0.052 274.2)
-
Step 400
400
#909DD5
oklch(70.7% 0.083 274)
-
Step 500
500
#7684CA
oklch(63.1% 0.107 274.3)
-
Step 600
600
#5F6CB7
oklch(55.5% 0.117 274.5)
-
Step 700
700
#4F5A9D
oklch(49.1% 0.108 274.7)
-
Step 800
800
#404A7F
oklch(42.6% 0.089 274)
-
Step 900
900 (this color)
#2A3158
oklch(32.7% 0.07 274.2)
-
Step 950
950
#20253C
oklch(27.1% 0.043 273.8)
#2A3158 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) | #22365A | 0.017 |
| Deuteranopia (no green cones) | #1E3257 | 0.017 |
| Tritanopia (no blue cones) | #183940 | 0.061 |
| Achromatopsia (no color) | #343434 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3158
#2A3158
oklch(32.7% 0.07 274.2)
- #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 #2A3158, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.020
- Space Cadet #2B2D42 ΔE 0.039
- Gunmetal #293241 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.043
- Marine #042E60 ΔE 0.045
- Marine Blue #01386A ΔE 0.047
- Midnight Green #073B4C ΔE 0.054
- Onyx #343A40 ΔE 0.061
Use #2A3158 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.