#1A4377
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.1 255.9), rgb(26, 67, 119).
Aa
White text reads best on this color (9.93:1).
About this color
#1A4377 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.100 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.011 away. White text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #1A4377 |
| RGB | rgb(26, 67, 119) |
| HSL | hsl(214, 64%, 28%) |
| OKLCH | oklch(38.3% 0.1 255.9) |
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 #1A4377 | 9.93:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #1A4377 | 2.11:1 | Fails | Lc 11.2 | Not readable |
| #1A4377 text on white | 9.93:1 | AAA | Lc 92.7 | Preferred for body text |
| #1A4377 text on black | 2.11:1 | Fails | Lc -9.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A1C3F1
oklch(80.8% 0.075 256.1)
-
Step 400
400
#6DA3EA
oklch(70.7% 0.119 255.7)
-
Step 500
500
#448AE4
oklch(63.2% 0.153 255.8)
-
Step 600
600
#2172D2
oklch(55.7% 0.166 255.7)
-
Step 700
700
#135FB6
oklch(49.2% 0.155 255.8)
-
Step 800
800
#144E93
oklch(42.8% 0.128 255.7)
-
Step 900
900 (this color)
#1A4377
oklch(38.3% 0.1 255.9)
-
Step 950
950
#0F2745
oklch(27.1% 0.064 255.3)
#1A4377 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) | #2A4779 | 0.022 |
| Deuteranopia (no green cones) | #1A3F76 | 0.012 |
| Tritanopia (no blue cones) | #004F57 | 0.076 |
| Achromatopsia (no color) | #434343 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A4377
#1A4377
oklch(38.3% 0.1 255.9)
- #5B3C00
#5B3C00
oklch(38.2% 0.08 76.2)
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 #1A4377, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.011
- Light Navy #155084 ΔE 0.041
- Cobalt #1E488F ΔE 0.042
- Marine Blue #01386A ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.053
- Dusk Blue #26538D ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.064
Use #1A4377 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.