#2A2F61
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.087 276.2), rgb(42, 47, 97).
Aa
White text reads best on this color (12.51:1).
About this color
#2A2F61 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.087 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.032 away. White text reads best on it, at 12.51:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.51:1 |
Values
| HEX | #2A2F61 |
| RGB | rgb(42, 47, 97) |
| HSL | hsl(235, 40%, 27%) |
| OKLCH | oklch(32.9% 0.087 276.2) |
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 #2A2F61 | 12.51:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #2A2F61 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #2A2F61 text on white | 12.51:1 | AAA | Lc 98.3 | Preferred for body text |
| #2A2F61 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B5BEEB
oklch(81% 0.064 276)
-
Step 400
400
#8F9BE2
oklch(70.8% 0.105 276)
-
Step 500
500
#7580D9
oklch(63.1% 0.134 276.5)
-
Step 600
600
#5E68C7
oklch(55.6% 0.146 276.1)
-
Step 700
700
#4E56AC
oklch(49.1% 0.136 276.2)
-
Step 800
800
#40478B
oklch(42.8% 0.111 276.2)
-
Step 900
900 (this color)
#2A2F61
oklch(32.9% 0.087 276.2)
-
Step 950
950
#1F2341
oklch(26.9% 0.056 276.2)
#2A2F61 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) | #183663 | 0.028 |
| Deuteranopia (no green cones) | #113160 | 0.030 |
| Tritanopia (no blue cones) | #113A43 | 0.077 |
| Achromatopsia (no color) | #343434 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A2F61
#2A2F61
oklch(32.9% 0.087 276.2)
- #3F3400
#3F3400
oklch(32.7% 0.067 96)
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 #2A2F61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.032
- Marine #042E60 ΔE 0.041
- Marine Blue #01386A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.059
- Gunmetal #293241 ΔE 0.061
- Midnight Green #073B4C ΔE 0.067
- Twilight Blue #0A437A ΔE 0.069
Use #2A2F61 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.