#1F3E82
Closest named color: Twilight Blue (#0A437A). oklch(38.2% 0.121 263.4), rgb(31, 62, 130).
Aa
White text reads best on this color (10.14:1).
About this color
#1F3E82 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.121 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.024 away. White text reads best on it, at 10.14:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.06:1 |
| White text | 10.14:1 |
Values
| HEX | #1F3E82 |
| RGB | rgb(31, 62, 130) |
| HSL | hsl(221, 61%, 32%) |
| OKLCH | oklch(38.2% 0.121 263.4) |
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 #1F3E82 | 10.14:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #1F3E82 | 2.06:1 | Fails | Lc 10.8 | Not readable |
| #1F3E82 text on white | 10.14:1 | AAA | Lc 93.2 | Preferred for body text |
| #1F3E82 text on black | 2.06:1 | Fails | Lc -9.3 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500
#4C82F8
oklch(63.1% 0.186 263.5)
-
Step 600
600
#3068E7
oklch(55.6% 0.202 263.4)
-
Step 700
700
#2456C9
oklch(49.2% 0.187 263.4)
-
Step 800
800
#1F47A2
oklch(42.7% 0.154 263.4)
-
Step 900
900 (this color)
#1F3E82
oklch(38.2% 0.121 263.4)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#1F3E82 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) | #144684 | 0.022 |
| Deuteranopia (no green cones) | #003D81 | 0.021 |
| Tritanopia (no blue cones) | #004E5A | 0.094 |
| Achromatopsia (no color) | #414141 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3E82
#1F3E82
oklch(38.2% 0.121 263.4)
- #573E00
#573E00
oklch(38.2% 0.079 82.8)
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 #1F3E82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.024
- Cobalt #1E488F ΔE 0.034
- Marine Blue #01386A ΔE 0.051
- Light Navy #155084 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.058
- Dusk Blue #26538D ΔE 0.063
- Blueberry #464196 ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.064
Use #1F3E82 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.