#1F486F
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.081 249.6), rgb(31, 72, 111).
Aa
White text reads best on this color (9.48:1).
About this color
#1F486F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.081 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #1F486F |
| RGB | rgb(31, 72, 111) |
| HSL | hsl(209, 56%, 28%) |
| OKLCH | oklch(39.2% 0.081 249.6) |
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 #1F486F | 9.48:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #1F486F | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #1F486F text on white | 9.48:1 | AAA | Lc 91.7 | Preferred for body text |
| #1F486F text on black | 2.21:1 | Fails | Lc -10.7 | 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
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DB
oklch(70.6% 0.098 249.8)
-
Step 500
500
#488ED1
oklch(63.1% 0.124 249.5)
-
Step 600
600
#2677BE
oklch(55.7% 0.134 249.4)
-
Step 700
700
#1763A4
oklch(49% 0.126 249.8)
-
Step 800
800
#175185
oklch(42.6% 0.104 249.9)
-
Step 900
900 (this color)
#1F486F
oklch(39.2% 0.081 249.6)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#1F486F 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) | #374A71 | 0.029 |
| Deuteranopia (no green cones) | #2B426E | 0.020 |
| Tritanopia (no blue cones) | #005156 | 0.061 |
| Achromatopsia (no color) | #464646 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F486F
#1F486F
oklch(39.2% 0.081 249.6)
- #613D07
#613D07
oklch(39.3% 0.081 70.2)
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 #1F486F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.034
- Light Navy #155084 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.043
- Charcoal #264653 ΔE 0.047
- Cobalt #1E488F ΔE 0.054
- Dusk Blue #26538D ΔE 0.057
- Marine Blue #01386A ΔE 0.057
Use #1F486F 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.