#1B5392
Closest named color: Dusk Blue (#26538D). oklch(44.1% 0.118 254.2), rgb(27, 83, 146).
Aa
White text reads best on this color (7.78:1).
About this color
#1B5392 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.118 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.011 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #1B5392 |
| RGB | rgb(27, 83, 146) |
| HSL | hsl(212, 69%, 34%) |
| OKLCH | oklch(44.1% 0.118 254.2) |
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 #1B5392 | 7.78:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #1B5392 | 2.69:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #1B5392 text on white | 7.78:1 | AAA | Lc 86.6 | Fine for body text |
| #1B5392 text on black | 2.69:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4ED
oklch(81% 0.069 253.4)
-
Step 400
400
#6FA4E4
oklch(70.8% 0.11 253.8)
-
Step 500
500
#478BDD
oklch(63.1% 0.142 254.5)
-
Step 600
600
#2573CA
oklch(55.5% 0.154 254.3)
-
Step 700
700
#1760AF
oklch(49% 0.143 254.4)
-
Step 800
800 (this color)
#1B5392
oklch(44.1% 0.118 254.2)
-
Step 900
900
#1A4271
oklch(37.7% 0.092 254.4)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#1B5392 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) | #345894 | 0.028 |
| Deuteranopia (no green cones) | #1E4D91 | 0.017 |
| Tritanopia (no blue cones) | #00626B | 0.090 |
| Achromatopsia (no color) | #525252 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5392
#1B5392
oklch(44.1% 0.118 254.2)
- #714A00
#714A00
oklch(44.2% 0.093 74.5)
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 #1B5392, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.011
- Light Navy #155084 ΔE 0.025
- Deep Sea Blue #015482 ΔE 0.031
- Cobalt #1E488F ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.041
- Twilight #4E518B ΔE 0.056
- Peacock Blue #016795 ΔE 0.058
Use #1B5392 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.