#1F2153
Closest named color: Marine (#042E60). oklch(27.8% 0.089 277.2), rgb(31, 33, 83).
Aa
White text reads best on this color (14.99:1).
About this color
#1F2153 is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.089 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.046 away. White text reads best on it, at 14.99:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.40:1 |
| White text | 14.99:1 |
Values
| HEX | #1F2153 |
| RGB | rgb(31, 33, 83) |
| HSL | hsl(238, 46%, 22%) |
| OKLCH | oklch(27.8% 0.089 277.2) |
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 #1F2153 | 14.99:1 | AAA | Lc -104.5 | Preferred for body text |
| Black text on #1F2153 | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #1F2153 text on white | 14.99:1 | AAA | Lc 101.7 | Preferred for body text |
| #1F2153 text on black | 1.40:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD6FF
oklch(88.4% 0.057 277.5)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#7075FF
oklch(63.1% 0.201 277.4)
-
Step 600
600
#5A54F8
oklch(55.6% 0.236 277.1)
-
Step 700
700
#4B43D8
oklch(49.1% 0.218 277.1)
-
Step 800
800
#3D38AE
oklch(42.6% 0.181 277.3)
-
Step 900
900
#33338A
oklch(37.7% 0.141 277.2)
-
Step 950
950 (this color)
#1F2153
oklch(27.8% 0.089 277.2)
#1F2153 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) | #012955 | 0.036 |
| Deuteranopia (no green cones) | #002552 | 0.034 |
| Tritanopia (no blue cones) | #022D36 | 0.079 |
| Achromatopsia (no color) | #272727 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2153
#1F2153
oklch(27.8% 0.089 277.2)
- #302800
#302800
oklch(27.7% 0.057 97.6)
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 #1F2153, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.053
- Midnight Blue #191970 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.060
- Dark #1B2431 ΔE 0.067
- Gunmetal #293241 ΔE 0.072
Use #1F2153 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.