#1B4D80
Closest named color: Light Navy (#155084). oklch(41.4% 0.101 252), rgb(27, 77, 128).
Aa
White text reads best on this color (8.67:1).
About this color
#1B4D80 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.101 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.010 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.41:1 |
| White text | 8.67:1 |
Values
| HEX | #1B4D80 |
| RGB | rgb(27, 77, 128) |
| HSL | hsl(210, 65%, 30%) |
| OKLCH | oklch(41.4% 0.101 252) |
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 #1B4D80 | 8.67:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #1B4D80 | 2.41:1 | Fails | Lc 14.5 | Not readable |
| #1B4D80 text on white | 8.67:1 | AAA | Lc 89.4 | Fine for body text |
| #1B4D80 text on black | 2.41:1 | Fails | Lc -12.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A6C4E6
oklch(81% 0.058 251.8)
-
Step 400
400
#75A4DA
oklch(70.6% 0.094 252.5)
-
Step 500
500
#4F8DD0
oklch(63.2% 0.12 251.9)
-
Step 600
600
#3176BD
oklch(55.7% 0.13 251.9)
-
Step 700
700
#2362A3
oklch(49% 0.122 252.3)
-
Step 800
800 (this color)
#1B4D80
oklch(41.4% 0.101 252)
-
Step 900
900
#1F436A
oklch(37.7% 0.079 252.3)
-
Step 950
950
#13283E
oklch(27.1% 0.049 251.1)
#1B4D80 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) | #355082 | 0.028 |
| Deuteranopia (no green cones) | #25477F | 0.018 |
| Tritanopia (no blue cones) | #005960 | 0.075 |
| Achromatopsia (no color) | #4B4B4B | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4D80
#1B4D80
oklch(41.4% 0.101 252)
- #694200
#694200
oklch(41.5% 0.089 71.6)
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 #1B4D80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.010
- Deep Sea Blue #015482 ΔE 0.022
- Dusk Blue #26538D ΔE 0.029
- Cobalt #1E488F ΔE 0.031
- Twilight Blue #0A437A ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.062
Use #1B4D80 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.