#1F3063
Closest named color: Marine (#042E60). oklch(32.5% 0.093 267.3), rgb(31, 48, 99).
Aa
White text reads best on this color (12.64:1).
About this color
#1F3063 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.093 and its hue 267°. 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 12.64:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.66:1 |
| White text | 12.64:1 |
Values
| HEX | #1F3063 |
| RGB | rgb(31, 48, 99) |
| HSL | hsl(225, 52%, 25%) |
| OKLCH | oklch(32.5% 0.093 267.3) |
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 #1F3063 | 12.64:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #1F3063 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #1F3063 text on white | 12.64:1 | AAA | Lc 98.4 | Preferred for body text |
| #1F3063 text on black | 1.66:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EF
oklch(81% 0.07 267.6)
-
Step 400
400
#829EE6
oklch(70.7% 0.111 267.3)
-
Step 500
500
#6384DF
oklch(63.1% 0.142 267.3)
-
Step 600
600
#4B6CCD
oklch(55.7% 0.154 267.2)
-
Step 700
700
#3C59B1
oklch(49% 0.144 267.2)
-
Step 800
800
#32498F
oklch(42.6% 0.119 267.5)
-
Step 900
900 (this color)
#1F3063
oklch(32.5% 0.093 267.3)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#1F3063 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) | #153665 | 0.019 |
| Deuteranopia (no green cones) | #073062 | 0.022 |
| Tritanopia (no blue cones) | #003C44 | 0.079 |
| Achromatopsia (no color) | #333333 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3063
#1F3063
oklch(32.5% 0.093 267.3)
- #433100
#433100
oklch(32.5% 0.066 86.2)
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 #1F3063, 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 0.029
- Marine Blue #01386A ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.060
- Midnight Green #073B4C ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Midnight Blue #191970 ΔE 0.064
Use #1F3063 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.