#1D3868
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.09 261), rgb(29, 56, 104).
Aa
White text reads best on this color (11.55:1).
About this color
#1D3868 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.090 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.020 away. White text reads best on it, at 11.55:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #1D3868 |
| RGB | rgb(29, 56, 104) |
| HSL | hsl(218, 56%, 26%) |
| OKLCH | oklch(34.7% 0.09 261) |
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 #1D3868 | 11.55:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #1D3868 | 1.81:1 | Fails | Lc 7.5 | Not readable |
| #1D3868 text on white | 11.55:1 | AAA | Lc 96.3 | Preferred for body text |
| #1D3868 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2ED
oklch(80.9% 0.067 260.4)
-
Step 400
400
#7AA1E4
oklch(70.7% 0.108 260.9)
-
Step 500
500
#5888DC
oklch(63.1% 0.137 260.9)
-
Step 600
600
#3D70CA
oklch(55.6% 0.15 260.8)
-
Step 700
700
#2F5DAF
oklch(49.1% 0.14 260.9)
-
Step 800
800
#284C8D
oklch(42.6% 0.116 261.2)
-
Step 900
900 (this color)
#1D3868
oklch(34.7% 0.09 261)
-
Step 950
950
#162642
oklch(27% 0.057 260.9)
#1D3868 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) | #213D6A | 0.017 |
| Deuteranopia (no green cones) | #143667 | 0.012 |
| Tritanopia (no blue cones) | #00434B | 0.072 |
| Achromatopsia (no color) | #393939 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3868
#1D3868
oklch(34.7% 0.09 261)
- #4D3500
#4D3500
oklch(34.8% 0.072 80.6)
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 #1D3868, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.020
- Prussian Blue #1D3557 ΔE 0.030
- Twilight Blue #0A437A ΔE 0.041
- Marine #042E60 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.051
- Midnight Green #073B4C ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.057
- Charcoal #264653 ΔE 0.066
Use #1D3868 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.