#1F2149
Closest named color: Oxford Blue (#1B263B). oklch(27% 0.073 278.2), rgb(31, 33, 73).
Aa
White text reads best on this color (15.30:1).
About this color
#1F2149 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.073 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.034 away. White text reads best on it, at 15.30:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.30:1 |
Values
| HEX | #1F2149 |
| RGB | rgb(31, 33, 73) |
| HSL | hsl(237, 40%, 20%) |
| OKLCH | oklch(27% 0.073 278.2) |
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 #1F2149 | 15.30:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #1F2149 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #1F2149 text on white | 15.30:1 | AAA | Lc 102.1 | Preferred for body text |
| #1F2149 text on black | 1.37:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF8
oklch(80.9% 0.085 277.7)
-
Step 400
400
#8D96F5
oklch(70.6% 0.138 278.1)
-
Step 500
500
#7479F1
oklch(63.1% 0.176 278.3)
-
Step 600
600
#5E5EE0
oklch(55.5% 0.193 278.1)
-
Step 700
700
#4E4DC2
oklch(49.1% 0.178 278)
-
Step 800
800
#40409D
oklch(42.7% 0.147 278.2)
-
Step 900
900
#35377D
oklch(37.6% 0.116 278)
-
Step 950
950 (this color)
#1F2149
oklch(27% 0.073 278.2)
#1F2149 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) | #0E274A | 0.027 |
| Deuteranopia (no green cones) | #0A2448 | 0.027 |
| Tritanopia (no blue cones) | #0D2A31 | 0.064 |
| Achromatopsia (no color) | #252525 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2149
#1F2149
oklch(27% 0.073 278.2)
- #2E2600
#2E2600
oklch(27% 0.056 97.1)
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 #1F2149, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.034
- Dark #1B2431 ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.050
- Marine #042E60 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.063
- Gunmetal #293241 ΔE 0.064
- Jet #212529 ΔE 0.065
Use #1F2149 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.