#1B416F
Closest named color: Twilight Blue (#0A437A). oklch(37.3% 0.09 254.8), rgb(27, 65, 111).
Aa
White text reads best on this color (10.33:1).
About this color
#1B416F is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.090 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.020 away. White text reads best on it, at 10.33:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.33:1 |
Values
| HEX | #1B416F |
| RGB | rgb(27, 65, 111) |
| HSL | hsl(213, 61%, 27%) |
| OKLCH | oklch(37.3% 0.09 254.8) |
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 #1B416F | 10.33:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #1B416F | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #1B416F text on white | 10.33:1 | AAA | Lc 93.7 | Preferred for body text |
| #1B416F text on black | 2.03:1 | Fails | Lc -8.8 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C3EC
oklch(80.8% 0.068 254.8)
-
Step 400
400
#71A3E3
oklch(70.6% 0.109 255)
-
Step 500
500
#4A8BDB
oklch(63.1% 0.138 254.8)
-
Step 600
600
#2A73C9
oklch(55.6% 0.151 255)
-
Step 700
700
#1C60AD
oklch(49% 0.14 254.8)
-
Step 800
800
#1A4F8C
oklch(42.7% 0.115 254.6)
-
Step 900
900 (this color)
#1B416F
oklch(37.3% 0.09 254.8)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#1B416F 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) | #2C4471 | 0.022 |
| Deuteranopia (no green cones) | #1E3D6E | 0.012 |
| Tritanopia (no blue cones) | #004C52 | 0.071 |
| Achromatopsia (no color) | #404040 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B416F
#1B416F
oklch(37.3% 0.09 254.8)
- #593900
#593900
oklch(37.3% 0.079 74)
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 #1B416F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.020
- Marine Blue #01386A ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Cobalt #1E488F ΔE 0.056
- Charcoal #264653 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
Use #1B416F 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.