#1B4E7D
Closest named color: Light Navy (#155084). oklch(41.5% 0.095 249.8), rgb(27, 78, 125).
Aa
White text reads best on this color (8.63:1).
About this color
#1B4E7D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.095 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.012 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #1B4E7D |
| RGB | rgb(27, 78, 125) |
| HSL | hsl(209, 64%, 30%) |
| OKLCH | oklch(41.5% 0.095 249.8) |
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 #1B4E7D | 8.63:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #1B4E7D | 2.43:1 | Fails | Lc 14.7 | Not readable |
| #1B4E7D text on white | 8.63:1 | AAA | Lc 89.3 | Fine for body text |
| #1B4E7D text on black | 2.43:1 | Fails | Lc -12.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#75A5D6
oklch(70.7% 0.089 249.7)
-
Step 500
500
#4F8ECB
oklch(63.1% 0.113 249.4)
-
Step 600
600
#3177B8
oklch(55.6% 0.123 249.6)
-
Step 700
700
#23649F
oklch(49.2% 0.115 249.6)
-
Step 800
800 (this color)
#1B4E7D
oklch(41.5% 0.095 249.8)
-
Step 900
900
#1F4467
oklch(37.7% 0.074 249.2)
-
Step 950
950
#13283C
oklch(27% 0.046 248.8)
#1B4E7D 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) | #38517F | 0.032 |
| Deuteranopia (no green cones) | #2A487C | 0.020 |
| Tritanopia (no blue cones) | #00595F | 0.071 |
| Achromatopsia (no color) | #4C4C4C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4E7D
#1B4E7D
oklch(41.5% 0.095 249.8)
- #6A4100
#6A4100
oklch(41.4% 0.09 69.7)
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 #1B4E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.012
- Deep Sea Blue #015482 ΔE 0.019
- Dusk Blue #26538D ΔE 0.031
- Twilight Blue #0A437A ΔE 0.037
- Cobalt #1E488F ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.057
- YInMn Blue #415A77 ΔE 0.060
Use #1B4E7D 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.