#1D345C
Closest named color: Prussian Blue (#1D3557). oklch(32.8% 0.077 260.7), rgb(29, 52, 92).
Aa
White text reads best on this color (12.36:1).
About this color
#1D345C is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.077 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.36:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.36:1 |
Values
| HEX | #1D345C |
| RGB | rgb(29, 52, 92) |
| HSL | hsl(218, 52%, 24%) |
| OKLCH | oklch(32.8% 0.077 260.7) |
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 #1D345C | 12.36:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #1D345C | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #1D345C text on white | 12.36:1 | AAA | Lc 98.0 | Preferred for body text |
| #1D345C text on black | 1.69:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E7
oklch(81% 0.058 260.8)
-
Step 400
400
#80A1DA
oklch(70.6% 0.092 261.1)
-
Step 500
500
#5F89D0
oklch(63.1% 0.117 260.4)
-
Step 600
600
#4672BE
oklch(55.7% 0.128 260.6)
-
Step 700
700
#375FA4
oklch(49.2% 0.12 260.6)
-
Step 800
800
#2E4E84
oklch(42.7% 0.098 260.3)
-
Step 900
900 (this color)
#1D345C
oklch(32.8% 0.077 260.7)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#1D345C 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) | #22385E | 0.015 |
| Deuteranopia (no green cones) | #19325B | 0.008 |
| Tritanopia (no blue cones) | #003D43 | 0.064 |
| Achromatopsia (no color) | #343434 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D345C
#1D345C
oklch(32.8% 0.077 260.7)
- #473000
#473000
oklch(32.8% 0.068 79.6)
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 #1D345C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Marine Blue #01386A ΔE 0.030
- Marine #042E60 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.040
- Midnight Green #073B4C ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.049
- Gunmetal #293241 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.062
Use #1D345C 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.