#2D3663
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.079 273.1), rgb(45, 54, 99).
Aa
White text reads best on this color (11.54:1).
About this color
#2D3663 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.079 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 11.54:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.54:1 |
Values
| HEX | #2D3663 |
| RGB | rgb(45, 54, 99) |
| HSL | hsl(230, 38%, 28%) |
| OKLCH | oklch(34.9% 0.079 273.1) |
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 #2D3663 | 11.54:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #2D3663 | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #2D3663 text on white | 11.54:1 | AAA | Lc 96.4 | Preferred for body text |
| #2D3663 text on black | 1.81:1 | 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
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D2D8F0
oklch(88.5% 0.034 274.5)
-
Step 300
300
#B4BFE8
oklch(81% 0.059 273.2)
-
Step 400
400
#8D9DDC
oklch(70.8% 0.094 272.8)
-
Step 500
500
#7283D3
oklch(63.1% 0.122 273.3)
-
Step 600
600
#5B6BC0
oklch(55.6% 0.133 273.3)
-
Step 700
700
#4B59A5
oklch(49.1% 0.122 273.2)
-
Step 800
800
#3D4986
oklch(42.6% 0.102 273)
-
Step 900
900 (this color)
#2D3663
oklch(34.9% 0.079 273.1)
-
Step 950
950
#1E243F
oklch(26.9% 0.051 273)
#2D3663 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) | #243B65 | 0.018 |
| Deuteranopia (no green cones) | #1E3762 | 0.020 |
| Tritanopia (no blue cones) | #164047 | 0.071 |
| Achromatopsia (no color) | #393939 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3663
#2D3663
oklch(34.9% 0.079 273.1)
- #473900
#473900
oklch(34.9% 0.072 93.4)
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 #2D3663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Marine Blue #01386A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.050
- Marine #042E60 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.060
- Gunmetal #293241 ΔE 0.061
Use #2D3663 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.