#1B4392
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.138 262), rgb(27, 67, 146).
Aa
White text reads best on this color (9.27:1).
About this color
#1B4392 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.138 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 9.27:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #1B4392 |
| RGB | rgb(27, 67, 146) |
| HSL | hsl(220, 69%, 34%) |
| OKLCH | oklch(40.4% 0.138 262) |
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 #1B4392 | 9.27:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1B4392 | 2.26:1 | Fails | Lc 13.1 | Not readable |
| #1B4392 text on white | 9.27:1 | AAA | Lc 90.9 | Preferred for body text |
| #1B4392 text on black | 2.26:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F6
oklch(80.8% 0.082 262.3)
-
Step 400
400
#749FF1
oklch(70.6% 0.13 262.5)
-
Step 500
500
#4F85EC
oklch(63% 0.165 262)
-
Step 600
600
#346CDA
oklch(55.6% 0.179 262.1)
-
Step 700
700
#2759BE
oklch(49% 0.168 262.3)
-
Step 800
800 (this color)
#1B4392
oklch(40.4% 0.138 262)
-
Step 900
900
#203F7A
oklch(37.8% 0.107 261.8)
-
Step 950
950
#132547
oklch(26.9% 0.068 261.9)
#1B4392 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) | #064D95 | 0.027 |
| Deuteranopia (no green cones) | #004290 | 0.016 |
| Tritanopia (no blue cones) | #005664 | 0.106 |
| Achromatopsia (no color) | #474747 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4392
#1B4392
oklch(40.4% 0.138 262)
- #5F4300
#5F4300
oklch(40.3% 0.083 81.5)
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 #1B4392, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Twilight Blue #0A437A ΔE 0.043
- Light Navy #155084 ΔE 0.046
- Sapphire #2138AB ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Blueberry #464196 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
Use #1B4392 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.