#1D4C71
Closest named color: Light Navy (#155084). oklch(40.3% 0.08 245.6), rgb(29, 76, 113).
Aa
White text reads best on this color (9.03:1).
About this color
#1D4C71 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.080 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.032 away. White text reads best on it, at 9.03:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.32:1 |
| White text | 9.03:1 |
Values
| HEX | #1D4C71 |
| RGB | rgb(29, 76, 113) |
| HSL | hsl(206, 59%, 28%) |
| OKLCH | oklch(40.3% 0.08 245.6) |
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 #1D4C71 | 9.03:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #1D4C71 | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #1D4C71 text on white | 9.03:1 | AAA | Lc 90.5 | Preferred for body text |
| #1D4C71 text on black | 2.32:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A8C4DE
oklch(80.8% 0.048 246.4)
-
Step 400
400
#79A6CD
oklch(70.7% 0.075 245.3)
-
Step 500
500
#558FC0
oklch(63.1% 0.096 245.6)
-
Step 600
600
#3879AC
oklch(55.7% 0.104 245)
-
Step 700
700
#2A6594
oklch(49.1% 0.097 245.8)
-
Step 800
800 (this color)
#1D4C71
oklch(40.3% 0.08 245.6)
-
Step 900
900
#234561
oklch(37.8% 0.063 245.4)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#1D4C71 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) | #3B4D73 | 0.034 |
| Deuteranopia (no green cones) | #304570 | 0.026 |
| Tritanopia (no blue cones) | #005559 | 0.059 |
| Achromatopsia (no color) | #494949 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4C71
#1D4C71
oklch(40.3% 0.08 245.6)
- #663E10
#663E10
oklch(40.3% 0.081 64.7)
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 #1D4C71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.032
- Deep Sea Blue #015482 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.038
- Dusk Blue #26538D ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Cobalt #1E488F ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.057
Use #1D4C71 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.