#1F2C59
Closest named color: Marine (#042E60). oklch(30.8% 0.082 269), rgb(31, 44, 89).
Aa
White text reads best on this color (13.43:1).
About this color
#1F2C59 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.082 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.026 away. White text reads best on it, at 13.43:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.56:1 |
| White text | 13.43:1 |
Values
| HEX | #1F2C59 |
| RGB | rgb(31, 44, 89) |
| HSL | hsl(227, 48%, 24%) |
| OKLCH | oklch(30.8% 0.082 269) |
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 #1F2C59 | 13.43:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #1F2C59 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #1F2C59 text on white | 13.43:1 | AAA | Lc 99.7 | Preferred for body text |
| #1F2C59 text on black | 1.56:1 | 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
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FE
oklch(88.4% 0.055 269.3)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600
#4360F0
oklch(55.6% 0.218 269.2)
-
Step 700
700
#354ED1
oklch(49% 0.203 269)
-
Step 800
800
#2C41A9
oklch(42.7% 0.168 269.2)
-
Step 900
900
#263985
oklch(37.7% 0.129 268.8)
-
Step 950
950 (this color)
#1F2C59
oklch(30.8% 0.082 269)
#1F2C59 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) | #16315B | 0.017 |
| Deuteranopia (no green cones) | #0D2C58 | 0.020 |
| Tritanopia (no blue cones) | #00363E | 0.071 |
| Achromatopsia (no color) | #2F2F2F | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2C59
#1F2C59
oklch(30.8% 0.082 269)
- #3D2E00
#3D2E00
oklch(31% 0.063 89.1)
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 #1F2C59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.026
- Prussian Blue #1D3557 ΔE 0.029
- Marine Blue #01386A ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.057
- Midnight Green #073B4C ΔE 0.060
Use #1F2C59 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.