#1A3D7E
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.118 261.4), rgb(26, 61, 126).
Aa
White text reads best on this color (10.43:1).
About this color
#1A3D7E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.118 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 10.43:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.01:1 |
| White text | 10.43:1 |
Values
| HEX | #1A3D7E |
| RGB | rgb(26, 61, 126) |
| HSL | hsl(219, 66%, 30%) |
| OKLCH | oklch(37.4% 0.118 261.4) |
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 #1A3D7E | 10.43:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #1A3D7E | 2.01:1 | Fails | Lc 10.1 | Not readable |
| #1A3D7E text on white | 10.43:1 | AAA | Lc 93.8 | Preferred for body text |
| #1A3D7E text on black | 2.01:1 | Fails | Lc -8.7 | 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 900.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A1C1FA
oklch(80.8% 0.088 261.8)
-
Step 400
400
#6E9FF8
oklch(70.7% 0.141 261.6)
-
Step 500
500
#4784F5
oklch(63.1% 0.181 261.5)
-
Step 600
600
#296AE4
oklch(55.5% 0.197 261.5)
-
Step 700
700
#1C58C6
oklch(49.2% 0.183 261.3)
-
Step 800
800
#1A49A0
oklch(42.8% 0.15 261.4)
-
Step 900
900 (this color)
#1A3D7E
oklch(37.4% 0.118 261.4)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#1A3D7E 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) | #164480 | 0.020 |
| Deuteranopia (no green cones) | #003B7D | 0.018 |
| Tritanopia (no blue cones) | #004D57 | 0.093 |
| Achromatopsia (no color) | #404040 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3D7E
#1A3D7E
oklch(37.4% 0.118 261.4)
- #553C00
#553C00
oklch(37.4% 0.077 82.1)
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 #1A3D7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Cobalt #1E488F ΔE 0.041
- Marine Blue #01386A ΔE 0.042
- Light Navy #155084 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.066
- Deep Sea Blue #015482 ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
Use #1A3D7E 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.