#1A3D7D
Closest named color: Twilight Blue (#0A437A). oklch(37.3% 0.116 261.2), rgb(26, 61, 125).
Aa
White text reads best on this color (10.46:1).
About this color
#1A3D7D is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.116 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.020 away. White text reads best on it, at 10.46:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #1A3D7D |
| RGB | rgb(26, 61, 125) |
| HSL | hsl(219, 66%, 30%) |
| OKLCH | oklch(37.3% 0.116 261.2) |
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 #1A3D7D | 10.46:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #1A3D7D | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #1A3D7D text on white | 10.46:1 | AAA | Lc 93.9 | Preferred for body text |
| #1A3D7D text on black | 2.00:1 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A1C2FA
oklch(81% 0.087 260.8)
-
Step 400
400
#6E9FF7
oklch(70.6% 0.14 261.4)
-
Step 500
500
#4884F3
oklch(63% 0.178 261.4)
-
Step 600
600
#2A6BE2
oklch(55.6% 0.193 261.2)
-
Step 700
700
#1D58C5
oklch(49.1% 0.181 261.4)
-
Step 800
800
#1A499F
oklch(42.7% 0.149 261.2)
-
Step 900
900 (this color)
#1A3D7D
oklch(37.3% 0.116 261.2)
-
Step 950
950
#11254A
oklch(27.1% 0.074 261.5)
#1A3D7D 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) | #17447F | 0.020 |
| Deuteranopia (no green cones) | #003B7C | 0.018 |
| Tritanopia (no blue cones) | #004C57 | 0.090 |
| Achromatopsia (no color) | #3F3F3F | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3D7D
#1A3D7D
oklch(37.3% 0.116 261.2)
- #553B00
#553B00
oklch(37.2% 0.077 80.7)
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 #1A3D7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.020
- Marine Blue #01386A ΔE 0.041
- Cobalt #1E488F ΔE 0.042
- Light Navy #155084 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.067
- Marine #042E60 ΔE 0.069
Use #1A3D7D 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.