#2A3753
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.053 264.7), rgb(42, 55, 83).
Aa
White text reads best on this color (11.86:1).
About this color
#2A3753 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.053 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 11.86:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.86:1 |
Values
| HEX | #2A3753 |
| RGB | rgb(42, 55, 83) |
| HSL | hsl(221, 33%, 25%) |
| OKLCH | oklch(33.9% 0.053 264.7) |
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 #2A3753 | 11.86:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2A3753 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #2A3753 text on white | 11.86:1 | AAA | Lc 97.2 | Preferred for body text |
| #2A3753 text on black | 1.76:1 | 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
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DB
oklch(80.9% 0.039 264.3)
-
Step 400
400
#8DA1C9
oklch(70.8% 0.063 264)
-
Step 500
500
#7189BB
oklch(63.1% 0.081 264.4)
-
Step 600
600
#5A72A7
oklch(55.6% 0.088 265.1)
-
Step 700
700
#4A608F
oklch(49.2% 0.08 264.5)
-
Step 800
800
#3C4E74
oklch(42.6% 0.068 264.4)
-
Step 900
900 (this color)
#2A3753
oklch(33.9% 0.053 264.7)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#2A3753 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) | #2D3954 | 0.008 |
| Deuteranopia (no green cones) | #283652 | 0.005 |
| Tritanopia (no blue cones) | #1B3D41 | 0.047 |
| Achromatopsia (no color) | #373737 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3753
#2A3753
oklch(33.9% 0.053 264.7)
- #443515
#443515
oklch(33.8% 0.052 84.2)
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 #2A3753, 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 0.023
- Gunmetal #293241 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.039
- Midnight Green #073B4C ΔE 0.039
- Onyx #343A40 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal #264653 ΔE 0.049
Use #2A3753 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.