#1B5482
Closest named color: Deep Sea Blue (#015482). oklch(43.3% 0.096 247), rgb(27, 84, 130).
Aa
White text reads best on this color (7.96:1).
About this color
#1B5482 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.096 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.011 away. White text reads best on it, at 7.96:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.63:1 |
| White text | 7.96:1 |
Values
| HEX | #1B5482 |
| RGB | rgb(27, 84, 130) |
| HSL | hsl(207, 66%, 31%) |
| OKLCH | oklch(43.3% 0.096 247) |
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 #1B5482 | 7.96:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #1B5482 | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #1B5482 text on white | 7.96:1 | AAA | Lc 87.3 | Fine for body text |
| #1B5482 text on black | 2.63:1 | Fails | Lc -14.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E3
oklch(80.9% 0.055 246)
-
Step 400
400
#72A6D6
oklch(70.7% 0.09 247.2)
-
Step 500
500
#4A8FCB
oklch(63.1% 0.115 247.1)
-
Step 600
600
#2978B8
oklch(55.6% 0.125 247.2)
-
Step 700
700
#1A659E
oklch(49.2% 0.115 246.7)
-
Step 800
800 (this color)
#1B5482
oklch(43.3% 0.096 247)
-
Step 900
900
#1C4467
oklch(37.6% 0.075 247.8)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#1B5482 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) | #3F5684 | 0.037 |
| Deuteranopia (no green cones) | #304D81 | 0.025 |
| Tritanopia (no blue cones) | #005F65 | 0.068 |
| Achromatopsia (no color) | #515151 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5482
#1B5482
oklch(43.3% 0.096 247)
- #734400
#734400
oklch(43.3% 0.096 66.6)
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 #1B5482, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.011
- Light Navy #155084 ΔE 0.014
- Dusk Blue #26538D ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.027
- Cobalt #1E488F ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.054
Use #1B5482 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.