#1F224A
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.073 277.2), rgb(31, 34, 74).
Aa
White text reads best on this color (15.15:1).
About this color
#1F224A is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.073 and its hue 277°. 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 15.15:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.15:1 |
Values
| HEX | #1F224A |
| RGB | rgb(31, 34, 74) |
| HSL | hsl(236, 41%, 21%) |
| OKLCH | oklch(27.3% 0.073 277.2) |
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 #1F224A | 15.15:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #1F224A | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #1F224A text on white | 15.15:1 | AAA | Lc 101.9 | Preferred for body text |
| #1F224A text on black | 1.38:1 | 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
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B2BCF9
oklch(80.9% 0.087 277.1)
-
Step 400
400
#8C97F5
oklch(70.7% 0.137 277.2)
-
Step 500
500
#727AF1
oklch(63.2% 0.175 277.2)
-
Step 600
600
#5C5FE0
oklch(55.6% 0.192 277.1)
-
Step 700
700
#4C4DC3
oklch(49% 0.18 277.1)
-
Step 800
800
#3E409D
oklch(42.6% 0.148 277.2)
-
Step 900
900
#34387D
oklch(37.7% 0.115 276.9)
-
Step 950
950 (this color)
#1F224A
oklch(27.3% 0.073 277.2)
#1F224A 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) | #0F284B | 0.026 |
| Deuteranopia (no green cones) | #0B2449 | 0.026 |
| Tritanopia (no blue cones) | #0C2B32 | 0.065 |
| Achromatopsia (no color) | #262626 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F224A
#1F224A
oklch(27.3% 0.073 277.2)
- #2F2700
#2F2700
oklch(27.4% 0.056 97.3)
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 #1F224A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.048
- Dark #1B2431 ΔE 0.050
- Marine #042E60 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.060
- Dark Indigo #1F0954 ΔE 0.061
- Gunmetal #293241 ΔE 0.062
- Jet #212529 ΔE 0.066
Use #1F224A 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.