#2A3767
Closest named color: Prussian Blue (#1D3557). oklch(35.2% 0.085 270.2), rgb(42, 55, 103).
Aa
White text reads best on this color (11.40:1).
About this color
#2A3767 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.085 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.034 away. White text reads best on it, at 11.40:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.40:1 |
Values
| HEX | #2A3767 |
| RGB | rgb(42, 55, 103) |
| HSL | hsl(227, 42%, 28%) |
| OKLCH | oklch(35.2% 0.085 270.2) |
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 #2A3767 | 11.40:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #2A3767 | 1.84:1 | Fails | Lc 7.7 | Not readable |
| #2A3767 text on white | 11.40:1 | AAA | Lc 96.1 | Preferred for body text |
| #2A3767 text on black | 1.84:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0BFEB
oklch(80.8% 0.065 270.2)
-
Step 400
400
#889DE1
oklch(70.7% 0.103 270.5)
-
Step 500
500
#6B84D8
oklch(63.2% 0.13 269.9)
-
Step 600
600
#546CC6
oklch(55.7% 0.142 270.1)
-
Step 700
700
#4459AB
oklch(49% 0.133 270.1)
-
Step 800
800
#38498A
oklch(42.6% 0.109 270.2)
-
Step 900
900 (this color)
#2A3767
oklch(35.2% 0.085 270.2)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#2A3767 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) | #223D69 | 0.019 |
| Deuteranopia (no green cones) | #1A3766 | 0.019 |
| Tritanopia (no blue cones) | #06424A | 0.076 |
| Achromatopsia (no color) | #3A3A3A | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A3767
#2A3767
oklch(35.2% 0.085 270.2)
- #493900
#493900
oklch(35.2% 0.072 91.1)
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 #2A3767, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.034
- Marine Blue #01386A ΔE 0.035
- Twilight Blue #0A437A ΔE 0.047
- Marine #042E60 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.056
- Midnight Green #073B4C ΔE 0.064
- Charcoal #264653 ΔE 0.066
Use #2A3767 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.