#1F2B59
Closest named color: Marine (#042E60). oklch(30.6% 0.084 269.9), rgb(31, 43, 89).
Aa
White text reads best on this color (13.56:1).
About this color
#1F2B59 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.084 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.027 away. White text reads best on it, at 13.56:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.54:1 |
| White text | 13.56:1 |
Values
| HEX | #1F2B59 |
| RGB | rgb(31, 43, 89) |
| HSL | hsl(228, 48%, 24%) |
| OKLCH | oklch(30.6% 0.084 269.9) |
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 #1F2B59 | 13.56:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #1F2B59 | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #1F2B59 text on white | 13.56:1 | AAA | Lc 99.9 | Preferred for body text |
| #1F2B59 text on black | 1.54:1 | 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 950.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#455FF2
oklch(55.7% 0.221 269.9)
-
Step 700
700
#384DD3
oklch(49.2% 0.206 270)
-
Step 800
800
#2E40AA
oklch(42.7% 0.17 270.1)
-
Step 900
900
#283887
oklch(37.7% 0.133 270.1)
-
Step 950
950 (this color)
#1F2B59
oklch(30.6% 0.084 269.9)
#1F2B59 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) | #14315B | 0.020 |
| Deuteranopia (no green cones) | #0A2C58 | 0.022 |
| Tritanopia (no blue cones) | #00353D | 0.073 |
| Achromatopsia (no color) | #2E2E2E | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2B59
#1F2B59
oklch(30.6% 0.084 269.9)
- #3B2D00
#3B2D00
oklch(30.4% 0.062 90.1)
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 #1F2B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.047
- Marine Blue #01386A ΔE 0.047
- Gunmetal #293241 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.060
- Midnight Blue #191970 ΔE 0.062
Use #1F2B59 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.