#1D305F
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.087 265.3), rgb(29, 48, 95).
Aa
White text reads best on this color (12.80:1).
About this color
#1D305F is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.087 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 12.80:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.80:1 |
Values
| HEX | #1D305F |
| RGB | rgb(29, 48, 95) |
| HSL | hsl(223, 53%, 24%) |
| OKLCH | oklch(32.1% 0.087 265.3) |
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 #1D305F | 12.80:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #1D305F | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1D305F text on white | 12.80:1 | AAA | Lc 98.7 | Preferred for body text |
| #1D305F text on black | 1.64:1 | 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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4E7FFF
oklch(63% 0.198 265.3)
-
Step 600
600
#3061F7
oklch(55.6% 0.23 265.4)
-
Step 700
700
#244FD7
oklch(49.1% 0.213 265.3)
-
Step 800
800
#1E42AE
oklch(42.7% 0.177 265.2)
-
Step 900
900
#1D3A89
oklch(37.8% 0.137 265.1)
-
Step 950
950 (this color)
#1D305F
oklch(32.1% 0.087 265.3)
#1D305F 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) | #193561 | 0.015 |
| Deuteranopia (no green cones) | #0D2F5E | 0.017 |
| Tritanopia (no blue cones) | #003B42 | 0.074 |
| Achromatopsia (no color) | #323232 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D305F
#1D305F
oklch(32.1% 0.087 265.3)
- #423000
#423000
oklch(32.1% 0.066 85.8)
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 #1D305F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Marine #042E60 ΔE 0.024
- Marine Blue #01386A ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
- Gunmetal #293241 ΔE 0.058
- Midnight Blue #191970 ΔE 0.067
Use #1D305F 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.