#1B5980
Closest named color: Light Navy Blue (#2E5A88). oklch(44.4% 0.089 241), rgb(27, 89, 128).
Aa
White text reads best on this color (7.53:1).
About this color
#1B5980 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.089 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.021 away. White text reads best on it, at 7.53:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #1B5980 |
| RGB | rgb(27, 89, 128) |
| HSL | hsl(203, 65%, 30%) |
| OKLCH | oklch(44.4% 0.089 241) |
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 #1B5980 | 7.53:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #1B5980 | 2.78:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #1B5980 text on white | 7.53:1 | AAA | Lc 85.9 | Fine for body text |
| #1B5980 text on black | 2.78:1 | Fails | Lc -16.2 | Dividers and decoration only |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#70A8D0
oklch(70.8% 0.083 240.5)
-
Step 500
500
#4791C4
oklch(63.1% 0.107 241.3)
-
Step 600
600
#237AB0
oklch(55.5% 0.115 241.4)
-
Step 700
700
#136797
oklch(49.1% 0.107 240.7)
-
Step 800
800 (this color)
#1B5980
oklch(44.4% 0.089 241)
-
Step 900
900
#1A4663
oklch(37.8% 0.069 241)
-
Step 950
950
#10293A
oklch(27% 0.044 240.8)
#1B5980 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) | #475A82 | 0.045 |
| Deuteranopia (no green cones) | #39507F | 0.035 |
| Tritanopia (no blue cones) | #006367 | 0.060 |
| Achromatopsia (no color) | #545454 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5980
#1B5980
oklch(44.4% 0.089 241)
- #774718
#774718
oklch(44.6% 0.089 60.9)
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 #1B5980, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy #155084 ΔE 0.031
- Dusk Blue #26538D ΔE 0.032
- YInMn Blue #415A77 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.044
- Denim #3B638C ΔE 0.047
- Peacock Blue #016795 ΔE 0.048
Use #1B5980 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.