#2A3151
Closest named color: Prussian Blue (#1D3557). oklch(32.3% 0.058 273.4), rgb(42, 49, 81).
Aa
White text reads best on this color (12.67:1).
About this color
#2A3151 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.058 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.67:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.65:1 |
| White text | 12.67:1 |
Values
| HEX | #2A3151 |
| RGB | rgb(42, 49, 81) |
| HSL | hsl(229, 32%, 24%) |
| OKLCH | oklch(32.3% 0.058 273.4) |
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 #2A3151 | 12.67:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #2A3151 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #2A3151 text on white | 12.67:1 | AAA | Lc 98.7 | Preferred for body text |
| #2A3151 text on black | 1.65:1 | 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 950.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEEE
oklch(80.9% 0.069 273.8)
-
Step 400
400
#8A9BE5
oklch(70.6% 0.11 273.4)
-
Step 500
500
#6F81DD
oklch(63.1% 0.14 273.4)
-
Step 600
600
#5869CB
oklch(55.7% 0.152 273.1)
-
Step 700
700
#4956B0
oklch(49.1% 0.143 273.8)
-
Step 800
800
#3B478E
oklch(42.6% 0.117 273.2)
-
Step 900
900
#333C71
oklch(37.6% 0.091 274)
-
Step 950
950 (this color)
#2A3151
oklch(32.3% 0.058 273.4)
#2A3151 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) | #263452 | 0.010 |
| Deuteranopia (no green cones) | #223150 | 0.012 |
| Tritanopia (no blue cones) | #1D383D | 0.052 |
| Achromatopsia (no color) | #333333 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3151
#2A3151
oklch(32.3% 0.058 273.4)
- #3D330A
#3D330A
oklch(32.3% 0.058 94.9)
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 #2A3151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Space Cadet #2B2D42 ΔE 0.027
- Gunmetal #293241 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.037
- Midnight Green #073B4C ΔE 0.047
- Marine #042E60 ΔE 0.050
- Onyx #343A40 ΔE 0.051
- Marine Blue #01386A ΔE 0.055
Use #2A3151 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.