#1F2E71
Closest named color: Marine Blue (#01386A). oklch(33.2% 0.117 269.4), rgb(31, 46, 113).
Aa
White text reads best on this color (12.44:1).
About this color
#1F2E71 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.117 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.037 away. White text reads best on it, at 12.44:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.68:1 |
| White text | 12.44:1 |
Values
| HEX | #1F2E71 |
| RGB | rgb(31, 46, 113) |
| HSL | hsl(229, 57%, 28%) |
| OKLCH | oklch(33.2% 0.117 269.4) |
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 #1F2E71 | 12.44:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #1F2E71 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #1F2E71 text on white | 12.44:1 | AAA | Lc 97.9 | Preferred for body text |
| #1F2E71 text on black | 1.68:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FA
oklch(88.4% 0.049 270)
-
Step 300
300
#AABFFA
oklch(81% 0.087 269.2)
-
Step 400
400
#7E9BF8
oklch(70.8% 0.14 269.5)
-
Step 500
500
#5F7FF5
oklch(63.2% 0.18 269.3)
-
Step 600
600
#4864E3
oklch(55.5% 0.195 269.6)
-
Step 700
700
#3A52C6
oklch(49.1% 0.182 269.5)
-
Step 800
800
#3044A0
oklch(42.7% 0.151 269.6)
-
Step 900
900 (this color)
#1F2E71
oklch(33.2% 0.117 269.4)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#1F2E71 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) | #003873 | 0.032 |
| Deuteranopia (no green cones) | #003070 | 0.025 |
| Tritanopia (no blue cones) | #003E4A | 0.095 |
| Achromatopsia (no color) | #343434 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2E71
#1F2E71
oklch(33.2% 0.117 269.4)
- #443400
#443400
oklch(33.3% 0.068 89.7)
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 #1F2E71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.037
- Marine #042E60 ΔE 0.040
- Midnight Blue #191970 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.059
- Royal #0C1793 ΔE 0.076
- Dark Blue Grey #1F3B4D ΔE 0.081
- Space Cadet #2B2D42 ΔE 0.084
Use #1F2E71 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.