#1B446F
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.087 252.1), rgb(27, 68, 111).
Aa
White text reads best on this color (9.98:1).
About this color
#1B446F is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.087 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 9.98:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.98:1 |
Values
| HEX | #1B446F |
| RGB | rgb(27, 68, 111) |
| HSL | hsl(211, 61%, 27%) |
| OKLCH | oklch(38.1% 0.087 252.1) |
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 #1B446F | 9.98:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #1B446F | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #1B446F text on white | 9.98:1 | AAA | Lc 92.9 | Preferred for body text |
| #1B446F text on black | 2.10:1 | Fails | Lc -9.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A3C4EA
oklch(80.9% 0.065 252.2)
-
Step 400
400
#6FA4E0
oklch(70.6% 0.105 252.3)
-
Step 500
500
#478DD7
oklch(63.2% 0.132 251.8)
-
Step 600
600
#2575C4
oklch(55.6% 0.144 252)
-
Step 700
700
#1662AA
oklch(49.1% 0.135 252)
-
Step 800
800
#165089
oklch(42.6% 0.111 252)
-
Step 900
900 (this color)
#1B446F
oklch(38.1% 0.087 252.1)
-
Step 950
950
#102740
oklch(26.8% 0.055 252.3)
#1B446F 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) | #304771 | 0.026 |
| Deuteranopia (no green cones) | #243F6E | 0.016 |
| Tritanopia (no blue cones) | #004E54 | 0.066 |
| Achromatopsia (no color) | #424242 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B446F
#1B446F
oklch(38.1% 0.087 252.1)
- #5D3A00
#5D3A00
oklch(38.1% 0.082 71.7)
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 #1B446F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Dark Grey Blue #29465B ΔE 0.039
- Marine Blue #01386A ΔE 0.044
- Light Navy #155084 ΔE 0.046
- Charcoal #264653 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.052
- Cobalt #1E488F ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.057
Use #1B446F 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.