#1B2E80
Closest named color: Marine Blue (#01386A). oklch(34.4% 0.14 267.9), rgb(27, 46, 128).
Aa
White text reads best on this color (12.00:1).
About this color
#1B2E80 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.140 and its hue 268°. 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 12.00:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.00:1 |
Values
| HEX | #1B2E80 |
| RGB | rgb(27, 46, 128) |
| HSL | hsl(229, 65%, 30%) |
| OKLCH | oklch(34.4% 0.14 267.9) |
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 #1B2E80 | 12.00:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #1B2E80 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #1B2E80 text on white | 12.00:1 | AAA | Lc 96.9 | Preferred for body text |
| #1B2E80 text on black | 1.74:1 | 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
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789BFF
oklch(70.8% 0.152 267.9)
-
Step 500
500
#577DFF
oklch(63.1% 0.197 268)
-
Step 600
600
#3B5EF9
oklch(55.6% 0.233 267.8)
-
Step 700
700
#2F4CD9
oklch(49.2% 0.217 267.9)
-
Step 800
800
#273FAF
oklch(42.6% 0.18 268.1)
-
Step 900
900 (this color)
#1B2E80
oklch(34.4% 0.14 267.9)
-
Step 950
950
#142251
oklch(27.1% 0.088 267.6)
#1B2E80 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) | #003B83 | 0.035 |
| Deuteranopia (no green cones) | #00327E | 0.020 |
| Tritanopia (no blue cones) | #004352 | 0.110 |
| Achromatopsia (no color) | #363636 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2E80
#1B2E80
oklch(34.4% 0.14 267.9)
- #483600
#483600
oklch(34.3% 0.07 87.9)
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 #1B2E80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.050
- Royal #0C1793 ΔE 0.057
- Midnight Blue #191970 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.059
- Marine #042E60 ΔE 0.060
- Cobalt #1E488F ΔE 0.074
- Prussian Blue #1D3557 ΔE 0.076
- Sapphire #2138AB ΔE 0.077
Use #1B2E80 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.