#1B446C
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.083 250.5), rgb(27, 68, 108).
Aa
White text reads best on this color (10.04:1).
About this color
#1B446C is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.083 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.08:1 |
| White text | 10.04:1 |
Values
| HEX | #1B446C |
| RGB | rgb(27, 68, 108) |
| HSL | hsl(210, 60%, 26%) |
| OKLCH | oklch(37.9% 0.083 250.5) |
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 #1B446C | 10.04:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #1B446C | 2.08:1 | Fails | Lc 10.9 | Not readable |
| #1B446C text on white | 10.04:1 | AAA | Lc 93.1 | Preferred for body text |
| #1B446C text on black | 2.08:1 | Fails | Lc -9.4 | 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 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
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DC
oklch(70.7% 0.099 250.2)
-
Step 500
500
#488DD3
oklch(63% 0.127 250.8)
-
Step 600
600
#2676C0
oklch(55.6% 0.138 250.5)
-
Step 700
700
#1763A6
oklch(49.1% 0.128 250.4)
-
Step 800
800
#175186
oklch(42.7% 0.106 250.3)
-
Step 900
900 (this color)
#1B446C
oklch(37.9% 0.083 250.5)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#1B446C 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) | #32466E | 0.027 |
| Deuteranopia (no green cones) | #263F6B | 0.017 |
| Tritanopia (no blue cones) | #004D53 | 0.061 |
| Achromatopsia (no color) | #424242 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B446C
#1B446C
oklch(37.9% 0.083 250.5)
- #5D3900
#5D3900
oklch(37.9% 0.082 70.4)
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 #1B446C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.034
- Marine Blue #01386A ΔE 0.044
- Charcoal #264653 ΔE 0.046
- Light Navy #155084 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.055
Use #1B446C 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.