#1B4A82
Closest named color: Light Navy (#155084). oklch(40.8% 0.107 254.9), rgb(27, 74, 130).
Aa
White text reads best on this color (8.94:1).
About this color
#1B4A82 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.107 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.017 away. White text reads best on it, at 8.94:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #1B4A82 |
| RGB | rgb(27, 74, 130) |
| HSL | hsl(213, 66%, 31%) |
| OKLCH | oklch(40.8% 0.107 254.9) |
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 #1B4A82 | 8.94:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #1B4A82 | 2.34:1 | Fails | Lc 13.8 | Not readable |
| #1B4A82 text on white | 8.94:1 | AAA | Lc 90.2 | Preferred for body text |
| #1B4A82 text on black | 2.34:1 | Fails | Lc -12.1 | 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A6C3E9
oklch(80.9% 0.063 255.3)
-
Step 400
400
#75A3DE
oklch(70.6% 0.1 255)
-
Step 500
500
#508BD5
oklch(63% 0.128 255)
-
Step 600
600
#3374C2
oklch(55.6% 0.138 254.8)
-
Step 700
700
#2561A8
oklch(49.2% 0.129 254.8)
-
Step 800
800 (this color)
#1B4A82
oklch(40.8% 0.107 254.9)
-
Step 900
900
#20426D
oklch(37.6% 0.084 255.3)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#1B4A82 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) | #2F4F84 | 0.026 |
| Deuteranopia (no green cones) | #1D4581 | 0.014 |
| Tritanopia (no blue cones) | #00575F | 0.081 |
| Achromatopsia (no color) | #494949 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4A82
#1B4A82
oklch(40.8% 0.107 254.9)
- #654200
#654200
oklch(40.9% 0.086 74.9)
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 #1B4A82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.017
- Cobalt #1E488F ΔE 0.023
- Twilight Blue #0A437A ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.030
- Dusk Blue #26538D ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.065
Use #1B4A82 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.