#1A5699
Closest named color: Dusk Blue (#26538D). oklch(45.3% 0.125 254.3), rgb(26, 86, 153).
Aa
White text reads best on this color (7.40:1).
About this color
#1A5699 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.125 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.021 away. White text reads best on it, at 7.40:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.83:1 |
| White text | 7.40:1 |
Values
| HEX | #1A5699 |
| RGB | rgb(26, 86, 153) |
| HSL | hsl(212, 71%, 35%) |
| OKLCH | oklch(45.3% 0.125 254.3) |
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 #1A5699 | 7.40:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #1A5699 | 2.83:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #1A5699 text on white | 7.40:1 | AAA | Lc 85.3 | Fine for body text |
| #1A5699 text on black | 2.83:1 | Fails | Lc -16.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A1C4F0
oklch(81% 0.073 254.4)
-
Step 400
400
#6CA4E8
oklch(70.8% 0.116 254)
-
Step 500
500
#428BE1
oklch(63.1% 0.149 254.3)
-
Step 600
600
#1D73CF
oklch(55.7% 0.162 254.3)
-
Step 700
700
#0D60B3
oklch(49.2% 0.15 254.2)
-
Step 800
800 (this color)
#1A5699
oklch(45.3% 0.125 254.3)
-
Step 900
900
#174274
oklch(37.8% 0.098 254.5)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#1A5699 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) | #345C9C | 0.030 |
| Deuteranopia (no green cones) | #1B5098 | 0.017 |
| Tritanopia (no blue cones) | #006670 | 0.094 |
| Achromatopsia (no color) | #555555 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A5699
#1A5699
oklch(45.3% 0.125 254.3)
- #754D00
#754D00
oklch(45.4% 0.096 74.8)
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 #1A5699, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.037
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.041
- Cobalt #1E488F ΔE 0.041
- Peacock Blue #016795 ΔE 0.051
- Dusky Blue #475F94 ΔE 0.055
Use #1A5699 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.