#1B477E
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.105 255.7), rgb(27, 71, 126).
Aa
White text reads best on this color (9.33:1).
About this color
#1B477E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.105 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.018 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #1B477E |
| RGB | rgb(27, 71, 126) |
| HSL | hsl(213, 65%, 30%) |
| OKLCH | oklch(39.8% 0.105 255.7) |
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 #1B477E | 9.33:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #1B477E | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #1B477E text on white | 9.33:1 | AAA | Lc 91.2 | Preferred for body text |
| #1B477E text on black | 2.24:1 | Fails | Lc -11.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#9FC3F3
oklch(80.8% 0.079 255.7)
-
Step 400
400
#6AA3EE
oklch(70.8% 0.126 255.7)
-
Step 500
500
#3F89E8
oklch(63% 0.161 256)
-
Step 600
600
#1871D6
oklch(55.6% 0.174 255.7)
-
Step 700
700
#065EBA
oklch(49.1% 0.163 255.8)
-
Step 800
800
#0D4D96
oklch(42.6% 0.134 255.8)
-
Step 900
900 (this color)
#1B477E
oklch(39.8% 0.105 255.7)
-
Step 950
950
#0E2746
oklch(27.1% 0.066 255.2)
#1B477E 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) | #2C4C80 | 0.024 |
| Deuteranopia (no green cones) | #1B437D | 0.012 |
| Tritanopia (no blue cones) | #00545C | 0.080 |
| Achromatopsia (no color) | #474747 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B477E
#1B477E
oklch(39.8% 0.105 255.7)
- #614000
#614000
oklch(39.9% 0.084 75.9)
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 #1B477E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.018
- Light Navy #155084 ΔE 0.027
- Cobalt #1E488F ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.038
- Dusk Blue #26538D ΔE 0.043
- Marine Blue #01386A ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.062
Use #1B477E 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.