#1A5589
Closest named color: Dusk Blue (#26538D). oklch(43.9% 0.104 249.3), rgb(26, 85, 137).
Aa
White text reads best on this color (7.76:1).
About this color
#1A5589 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.104 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.013 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #1A5589 |
| RGB | rgb(26, 85, 137) |
| HSL | hsl(208, 68%, 32%) |
| OKLCH | oklch(43.9% 0.104 249.3) |
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 #1A5589 | 7.76:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #1A5589 | 2.70:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #1A5589 text on white | 7.76:1 | AAA | Lc 86.6 | Fine for body text |
| #1A5589 text on black | 2.70:1 | Fails | Lc -15.5 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEF
oklch(88.6% 0.033 248.2)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DB
oklch(70.6% 0.098 249.8)
-
Step 500
500
#478ED1
oklch(63.1% 0.124 249.2)
-
Step 600
600
#2477BE
oklch(55.6% 0.135 249)
-
Step 700
700
#1563A4
oklch(49% 0.126 249.5)
-
Step 800
800 (this color)
#1A5589
oklch(43.9% 0.104 249.3)
-
Step 900
900
#1A446B
oklch(37.8% 0.082 249.5)
-
Step 950
950
#10283E
oklch(27% 0.051 248.4)
#1A5589 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) | #3D588B | 0.036 |
| Deuteranopia (no green cones) | #2C4E88 | 0.023 |
| Tritanopia (no blue cones) | #006168 | 0.076 |
| Achromatopsia (no color) | #525252 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A5589
#1A5589
oklch(43.9% 0.104 249.3)
- #744700
#744700
oklch(44% 0.096 69.1)
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 #1A5589, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.013
- Light Navy #155084 ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.040
- Cobalt #1E488F ΔE 0.040
- YInMn Blue #415A77 ΔE 0.052
- Peacock Blue #016795 ΔE 0.053
Use #1A5589 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.