#1B5985
Closest named color: Light Navy Blue (#2E5A88). oklch(44.7% 0.095 244.2), rgb(27, 89, 133).
Aa
White text reads best on this color (7.46:1).
About this color
#1B5985 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.095 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.017 away. White text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.81:1 |
| White text | 7.46:1 |
Values
| HEX | #1B5985 |
| RGB | rgb(27, 89, 133) |
| HSL | hsl(205, 66%, 31%) |
| OKLCH | oklch(44.7% 0.095 244.2) |
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 #1B5985 | 7.46:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #1B5985 | 2.81:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #1B5985 text on white | 7.46:1 | AAA | Lc 85.6 | Fine for body text |
| #1B5985 text on black | 2.81:1 | Fails | Lc -16.4 | 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400
#6FA7D4
oklch(70.7% 0.089 243.7)
-
Step 500
500
#4690C9
oklch(63.1% 0.113 244.3)
-
Step 600
600
#2179B6
oklch(55.6% 0.124 244.4)
-
Step 700
700
#11669C
oklch(49.1% 0.114 243.8)
-
Step 800
800 (this color)
#1B5985
oklch(44.7% 0.095 244.2)
-
Step 900
900
#194566
oklch(37.7% 0.074 244.5)
-
Step 950
950
#10293C
oklch(27.1% 0.047 243.8)
#1B5985 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) | #455A87 | 0.042 |
| Deuteranopia (no green cones) | #365184 | 0.031 |
| Tritanopia (no blue cones) | #006469 | 0.067 |
| Achromatopsia (no color) | #555555 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5985
#1B5985
oklch(44.7% 0.095 244.2)
- #78470C
#78470C
oklch(44.6% 0.095 64)
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 #1B5985, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.021
- Dusk Blue #26538D ΔE 0.025
- Light Navy #155084 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.042
- Peacock Blue #016795 ΔE 0.044
- Denim #3B638C ΔE 0.045
Use #1B5985 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.