#1F2F7E
Closest named color: Marine Blue (#01386A). oklch(34.6% 0.135 269.2), rgb(31, 47, 126).
Aa
White text reads best on this color (11.89:1).
About this color
#1F2F7E is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.135 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 11.89:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.89:1 |
Values
| HEX | #1F2F7E |
| RGB | rgb(31, 47, 126) |
| HSL | hsl(230, 61%, 31%) |
| OKLCH | oklch(34.6% 0.135 269.2) |
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 #1F2F7E | 11.89:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #1F2F7E | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #1F2F7E text on white | 11.89:1 | AAA | Lc 96.8 | Preferred for body text |
| #1F2F7E text on black | 1.76:1 | Fails | Lc 0.0 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5B7CFF
oklch(63.1% 0.198 269.4)
-
Step 600
600
#425FF4
oklch(55.7% 0.224 269.2)
-
Step 700
700
#354DD4
oklch(49.1% 0.208 269.2)
-
Step 800
800
#2C40AC
oklch(42.8% 0.173 269.4)
-
Step 900
900 (this color)
#1F2F7E
oklch(34.6% 0.135 269.2)
-
Step 950
950
#16224F
oklch(27% 0.084 268.9)
#1F2F7E 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) | #003C81 | 0.036 |
| Deuteranopia (no green cones) | #00337C | 0.024 |
| Tritanopia (no blue cones) | #004351 | 0.108 |
| Achromatopsia (no color) | #373737 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2F7E
#1F2F7E
oklch(34.6% 0.135 269.2)
- #483700
#483700
oklch(34.6% 0.071 89.4)
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 #1F2F7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Twilight Blue #0A437A ΔE 0.056
- Marine #042E60 ΔE 0.059
- Midnight Blue #191970 ΔE 0.059
- Royal #0C1793 ΔE 0.063
- Cobalt #1E488F ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.079
Use #1F2F7E 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.