#1A3765
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.088 259.3), rgb(26, 55, 101).
Aa
White text reads best on this color (11.80:1).
About this color
#1A3765 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.088 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.018 away. White text reads best on it, at 11.80:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.80:1 |
Values
| HEX | #1A3765 |
| RGB | rgb(26, 55, 101) |
| HSL | hsl(217, 59%, 25%) |
| OKLCH | oklch(34.1% 0.088 259.3) |
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 #1A3765 | 11.80:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #1A3765 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #1A3765 text on white | 11.80:1 | AAA | Lc 96.8 | Preferred for body text |
| #1A3765 text on black | 1.77:1 | Fails | Lc 0.0 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C2EC
oklch(80.8% 0.067 259.1)
-
Step 400
400
#78A2E2
oklch(70.7% 0.105 258.6)
-
Step 500
500
#5689DA
oklch(63.1% 0.134 259.3)
-
Step 600
600
#3A71C8
oklch(55.6% 0.147 259.3)
-
Step 700
700
#2D5EAD
oklch(49.1% 0.137 259.6)
-
Step 800
800
#264D8C
oklch(42.7% 0.114 259.6)
-
Step 900
900 (this color)
#1A3765
oklch(34.1% 0.088 259.3)
-
Step 950
950
#152641
oklch(26.9% 0.056 259.3)
#1A3765 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) | #213B67 | 0.016 |
| Deuteranopia (no green cones) | #143464 | 0.012 |
| Tritanopia (no blue cones) | #004249 | 0.070 |
| Achromatopsia (no color) | #383838 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3765
#1A3765
oklch(34.1% 0.088 259.3)
- #4B3300
#4B3300
oklch(34% 0.071 79.7)
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 #1A3765, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.018
- Prussian Blue #1D3557 ΔE 0.024
- Marine #042E60 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.048
- Midnight Green #073B4C ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.059
- Gunmetal #293241 ΔE 0.064
Use #1A3765 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.