#1F446C
Closest named color: Twilight Blue (#0A437A). oklch(38% 0.081 252.3), rgb(31, 68, 108).
Aa
White text reads best on this color (9.99:1).
About this color
#1F446C is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.081 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.028 away. White text reads best on it, at 9.99:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.99:1 |
Values
| HEX | #1F446C |
| RGB | rgb(31, 68, 108) |
| HSL | hsl(211, 55%, 27%) |
| OKLCH | oklch(38% 0.081 252.3) |
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 #1F446C | 9.99:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #1F446C | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #1F446C text on white | 9.99:1 | AAA | Lc 93.0 | Preferred for body text |
| #1F446C text on black | 2.10:1 | Fails | Lc -9.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E7
oklch(80.9% 0.06 251.7)
-
Step 400
400
#74A4DC
oklch(70.7% 0.097 252.9)
-
Step 500
500
#4D8DD2
oklch(63.2% 0.124 251.9)
-
Step 600
600
#2E75BF
oklch(55.5% 0.135 252.3)
-
Step 700
700
#2062A5
oklch(49% 0.126 252.3)
-
Step 800
800
#1D5086
oklch(42.6% 0.105 252.7)
-
Step 900
900 (this color)
#1F446C
oklch(38% 0.081 252.3)
-
Step 950
950
#13283F
oklch(27.2% 0.051 252.1)
#1F446C 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 | 0.024 |
| Deuteranopia (no green cones) | #273F6B | 0.016 |
| Tritanopia (no blue cones) | #004D53 | 0.062 |
| Achromatopsia (no color) | #424242 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F446C
#1F446C
oklch(38% 0.081 252.3)
- #5C3A01
#5C3A01
oklch(38% 0.08 72.3)
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 #1F446C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.033
- Marine Blue #01386A ΔE 0.046
- Charcoal #264653 ΔE 0.046
- Light Navy #155084 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.056
Use #1F446C 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.