#1F2E73
Closest named color: Marine Blue (#01386A). oklch(33.4% 0.12 269.5), rgb(31, 46, 115).
Aa
White text reads best on this color (12.37:1).
About this color
#1F2E73 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.120 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.038 away. White text reads best on it, at 12.37:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.69:1 |
| White text | 12.37:1 |
Values
| HEX | #1F2E73 |
| RGB | rgb(31, 46, 115) |
| HSL | hsl(229, 58%, 29%) |
| OKLCH | oklch(33.4% 0.12 269.5) |
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 #1F2E73 | 12.37:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #1F2E73 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #1F2E73 text on white | 12.37:1 | AAA | Lc 97.8 | Preferred for body text |
| #1F2E73 text on black | 1.69:1 | 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
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFA
oklch(70.6% 0.144 269.7)
-
Step 500
500
#5E7EF7
oklch(63.1% 0.184 269.4)
-
Step 600
600
#4763E6
oklch(55.5% 0.2 269.6)
-
Step 700
700
#3951C8
oklch(49% 0.186 269.5)
-
Step 800
800
#2F43A2
oklch(42.6% 0.155 269.6)
-
Step 900
900 (this color)
#1F2E73
oklch(33.4% 0.12 269.5)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#1F2E73 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) | #003875 | 0.032 |
| Deuteranopia (no green cones) | #003172 | 0.025 |
| Tritanopia (no blue cones) | #003F4B | 0.098 |
| Achromatopsia (no color) | #343434 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2E73
#1F2E73
oklch(33.4% 0.12 269.5)
- #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 #1F2E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.038
- Marine #042E60 ΔE 0.042
- Midnight Blue #191970 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.059
- Royal #0C1793 ΔE 0.074
- Cobalt #1E488F ΔE 0.083
- Dark Blue Grey #1F3B4D ΔE 0.084
Use #1F2E73 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.