#2A3754
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.054 265.2), rgb(42, 55, 84).
Aa
White text reads best on this color (11.84:1).
About this color
#2A3754 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.054 and its hue 265°. 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 11.84:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.84:1 |
Values
| HEX | #2A3754 |
| RGB | rgb(42, 55, 84) |
| HSL | hsl(221, 33%, 25%) |
| OKLCH | oklch(33.9% 0.054 265.2) |
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 #2A3754 | 11.84:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2A3754 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #2A3754 text on white | 11.84:1 | AAA | Lc 97.1 | Preferred for body text |
| #2A3754 text on black | 1.77:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E9
oklch(88.5% 0.023 266.9)
-
Step 300
300
#B4C1DC
oklch(81% 0.041 265)
-
Step 400
400
#8DA0CA
oklch(70.6% 0.065 265.8)
-
Step 500
500
#7189BC
oklch(63.2% 0.082 264.7)
-
Step 600
600
#5972A9
oklch(55.6% 0.091 264.9)
-
Step 700
700
#495F91
oklch(49% 0.085 265.3)
-
Step 800
800
#3C4E75
oklch(42.7% 0.069 264.7)
-
Step 900
900 (this color)
#2A3754
oklch(33.9% 0.054 265.2)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#2A3754 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) | #2C3955 | 0.007 |
| Deuteranopia (no green cones) | #283653 | 0.005 |
| Tritanopia (no blue cones) | #1A3D41 | 0.049 |
| Achromatopsia (no color) | #373737 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3754
#2A3754
oklch(33.9% 0.054 265.2)
- #453513
#453513
oklch(33.9% 0.054 83.7)
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 #2A3754, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.025
- Gunmetal #293241 ΔE 0.034
- Midnight Green #073B4C ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.040
- Onyx #343A40 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal #264653 ΔE 0.050
Use #2A3754 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.