#1D4B72
Closest named color: Light Navy (#155084). oklch(40.1% 0.083 247.3), rgb(29, 75, 114).
Aa
White text reads best on this color (9.12:1).
About this color
#1D4B72 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.083 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.031 away. White text reads best on it, at 9.12:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #1D4B72 |
| RGB | rgb(29, 75, 114) |
| HSL | hsl(208, 59%, 28%) |
| OKLCH | oklch(40.1% 0.083 247.3) |
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 #1D4B72 | 9.12:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #1D4B72 | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #1D4B72 text on white | 9.12:1 | AAA | Lc 90.7 | Preferred for body text |
| #1D4B72 text on black | 2.30:1 | Fails | Lc -11.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400
#6CA6DB
oklch(70.6% 0.099 247.2)
-
Step 500
500
#418FD2
oklch(63.2% 0.127 247.4)
-
Step 600
600
#1878BF
oklch(55.7% 0.138 247.2)
-
Step 700
700
#0564A5
oklch(49% 0.129 247.6)
-
Step 800
800
#0D5285
oklch(42.7% 0.106 247.2)
-
Step 900
900 (this color)
#1D4B72
oklch(40.1% 0.083 247.3)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#1D4B72 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) | #394D74 | 0.032 |
| Deuteranopia (no green cones) | #2D4571 | 0.022 |
| Tritanopia (no blue cones) | #005459 | 0.060 |
| Achromatopsia (no color) | #484848 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4B72
#1D4B72
oklch(40.1% 0.083 247.3)
- #653E0A
#653E0A
oklch(40.1% 0.083 67.4)
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 #1D4B72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.039
- Dusk Blue #26538D ΔE 0.049
- Cobalt #1E488F ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.058
Use #1D4B72 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.