#1D395F
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.075 256.6), rgb(29, 57, 95).
Aa
White text reads best on this color (11.64:1).
About this color
#1D395F is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.075 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 11.64:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.80:1 |
| White text | 11.64:1 |
Values
| HEX | #1D395F |
| RGB | rgb(29, 57, 95) |
| HSL | hsl(215, 53%, 24%) |
| OKLCH | oklch(34.3% 0.075 256.6) |
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 #1D395F | 11.64:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #1D395F | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #1D395F text on white | 11.64:1 | AAA | Lc 96.6 | Preferred for body text |
| #1D395F text on black | 1.80:1 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC3E5
oklch(81% 0.055 256.1)
-
Step 400
400
#7CA3D9
oklch(70.8% 0.09 256.6)
-
Step 500
500
#5A8BCE
oklch(63.1% 0.115 256.5)
-
Step 600
600
#3F74BB
oklch(55.7% 0.125 256.4)
-
Step 700
700
#3161A1
oklch(49.1% 0.116 256.4)
-
Step 800
800
#294F83
oklch(42.7% 0.097 256.8)
-
Step 900
900 (this color)
#1D395F
oklch(34.3% 0.075 256.6)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#1D395F 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) | #283C61 | 0.017 |
| Deuteranopia (no green cones) | #1F365E | 0.009 |
| Tritanopia (no blue cones) | #004247 | 0.062 |
| Achromatopsia (no color) | #383838 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D395F
#1D395F
oklch(34.3% 0.075 256.6)
- #4D3300
#4D3300
oklch(34.3% 0.072 77.5)
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 #1D395F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Marine Blue #01386A ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.034
- Midnight Green #073B4C ΔE 0.041
- Marine #042E60 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Gunmetal #293241 ΔE 0.053
Use #1D395F 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.