#1D3256
Closest named color: Prussian Blue (#1D3557). oklch(31.9% 0.07 260.5), rgb(29, 50, 86).
Aa
White text reads best on this color (12.78:1).
About this color
#1D3256 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.070 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.009 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #1D3256 |
| RGB | rgb(29, 50, 86) |
| HSL | hsl(218, 50%, 23%) |
| OKLCH | oklch(31.9% 0.07 260.5) |
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 #1D3256 | 12.78:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #1D3256 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1D3256 text on white | 12.78:1 | AAA | Lc 98.7 | Preferred for body text |
| #1D3256 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A2C2F7
oklch(80.9% 0.083 260.4)
-
Step 400
400
#6FA0F3
oklch(70.7% 0.133 260.5)
-
Step 500
500
#4986EE
oklch(63.1% 0.169 260.4)
-
Step 600
600
#2B6DDD
oklch(55.7% 0.184 260.4)
-
Step 700
700
#1E5AC0
oklch(49.1% 0.172 260.5)
-
Step 800
800
#1B4A9B
oklch(42.7% 0.142 260.6)
-
Step 900
900
#1C3F7B
oklch(37.7% 0.11 260.4)
-
Step 950
950 (this color)
#1D3256
oklch(31.9% 0.07 260.5)
#1D3256 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) | #223557 | 0.012 |
| Deuteranopia (no green cones) | #1B3055 | 0.007 |
| Tritanopia (no blue cones) | #003A3F | 0.060 |
| Achromatopsia (no color) | #323232 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3256
#1D3256
oklch(31.9% 0.07 260.5)
- #442E00
#442E00
oklch(31.9% 0.066 79.9)
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 #1D3256, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.009
- Marine #042E60 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.039
- Marine Blue #01386A ΔE 0.039
- Gunmetal #293241 ΔE 0.040
- Midnight Green #073B4C ΔE 0.041
- Oxford Blue #1B263B ΔE 0.057
Use #1D3256 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.