#1A3283
Closest named color: Marine Blue (#01386A). oklch(35.4% 0.139 266.4), rgb(26, 50, 131).
Aa
White text reads best on this color (11.48:1).
About this color
#1A3283 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.139 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.050 away. White text reads best on it, at 11.48:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.48:1 |
Values
| HEX | #1A3283 |
| RGB | rgb(26, 50, 131) |
| HSL | hsl(226, 67%, 31%) |
| OKLCH | oklch(35.4% 0.139 266.4) |
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 #1A3283 | 11.48:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #1A3283 | 1.82:1 | Fails | Lc 8.0 | Not readable |
| #1A3283 text on white | 11.48:1 | AAA | Lc 95.9 | Preferred for body text |
| #1A3283 text on black | 1.82:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFF
oklch(70.8% 0.151 266.4)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#3560F8
oklch(55.7% 0.231 266.4)
-
Step 700
700
#294DD8
oklch(49% 0.216 266.5)
-
Step 800
800
#2241AF
oklch(42.8% 0.179 266.4)
-
Step 900
900 (this color)
#1A3283
oklch(35.4% 0.139 266.4)
-
Step 950
950
#122251
oklch(27% 0.089 266.3)
#1A3283 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) | #003E86 | 0.032 |
| Deuteranopia (no green cones) | #003581 | 0.018 |
| Tritanopia (no blue cones) | #004755 | 0.110 |
| Achromatopsia (no color) | #393939 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3283
#1A3283
oklch(35.4% 0.139 266.4)
- #4C3800
#4C3800
oklch(35.3% 0.072 86.2)
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 #1A3283, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.050
- Royal #0C1793 ΔE 0.062
- Cobalt #1E488F ΔE 0.063
- Marine #042E60 ΔE 0.066
- Midnight Blue #191970 ΔE 0.068
- Sapphire #2138AB ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.076
Use #1A3283 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.